In an examination there are 3 multiple choice questions and each question has 4 choices. If a student randomly selects answer for all -Maths 9th

In an examination there are 3 multiple choice questions and each question has 4 choices. If a student randomly selects answer for all -Maths 9th
by

1 Answer

Answer :

Probability of selecting a correct choice for a question = \(rac{1}{4}\)(∵ Out of 4 choices only one is correct)∴ Probability of answering all the three questions correctly = \(rac{1}{4}\)x \(rac{1}{4}\)x\(rac{1}{4}\) = \(rac{1}{64}\)⇒ Probability of not answering all the three questions correctly = 1 - \(rac{1}{64}\) = \(rac{63}{64}\).
by

Related questions

A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. -Maths 9th

Description : A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. -Maths 9th

Last Answer : (c) \(rac{11}{3^5}\)Probability of guessing a correct answer = \(rac{1}{3}\)Probability of guessing an incorrect answer = \(rac{2}{3}\)∴ Probability of guessing 4 or more correct answers = 5C4 \(\big(rac{1}{3}\big)^4\)\(\big(rac{2 ... )^5\) = 5 x \(rac{2}{3^5}\) + \(rac{1}{3^5}\) = \(rac{11}{3^5}\).

The probability of student A passing examination is 3/7 and of student B passing is 5/7 Assuming the two events “A passes”, -Maths 9th

Description : The probability of student A passing examination is 3/7 and of student B passing is 5/7 Assuming the two events “A passes”, -Maths 9th

Last Answer : p1 = P(A) = \(rac{3}{7}\), p2 = P(B) = \(rac{5}{7}\) ∴ q1 = P(\(\bar{A}\)) = 1 - P(A) = 1 - \(rac{3}{7}\) = \(rac{4}{7}\). q2 = P(\(\bar{B}\)) = 1 - P(B) = 1 - \(rac{5}{7}\) = \(rac{2}{7}\) ... passes) = p1 q2 + q1 p2 = \(rac{3}{7}\) x \(rac{2}{7}\) + \(rac{4}{7}\) x \(rac{5}{7}\) = \(rac{26}{49}.\)

Five horses are in a race. Mr A. Selects two of the horses at random and bets on them. The probability that Mr A selected the winning horse is -Maths 9th

Description : Five horses are in a race. Mr A. Selects two of the horses at random and bets on them. The probability that Mr A selected the winning horse is -Maths 9th

Last Answer : (b) \(rac{2}{5}\)As each horse has equal chance of winning the race, Number of ways in which one of the five horses wins the race = 5C1 ∴ n(S) =5C1 = \(rac{|\underline5}{|\underline4|\underline1}\) 5To find the chance ... n(E) = 2C1 = 2 ∴ Required probability = \(rac{n(E)}{n(S)}\) = \(rac{2}{5}\).

Ramesh is a student of standard X. He organized many activities in his school to convey the students about the various advantages and disadvantages of using renewable and non-renewable sources of energy. Many students of the school took part and concluded about the best choices of energy sources on this basis. Answer the following questions: (i) What activities Ramesh might have had assigned for the students? (ii) Name any two renewable sources of energy. (in) Which two values are reflected in Ramesh’s thought and action? -Science

Description : Ramesh is a student of standard X. He organized many activities in his school to convey the students about the various advantages and disadvantages of using renewable and non-renewable sources of energy. Many ... of energy. (in) Which two values are reflected in Ramesh's thought and action? -Science

Last Answer : (i) Activities that Ramesh have had assigned for the students are: (a) Hands on projects related to renewable and non-renewable sources of energy. (b) Photograph exhibitions on the topic ... of renewable source of energy. Ramesh’s action: Concern for community advantage and good management.

What are the characteristics of Continuous and Comprehensive Evaluation ? (a) It increases the workload on students by taking multiple tests. (b) It replaces marks with grades. (c) It evaluates every aspect of the student. (d) It helps in reducing examination phobia. Select the correct answer from the codes given below: (A) (a), (b), (c) and (d) (B) (b) and (d) (C) (a), (b) and (c) (D) (b), (c) and (d)

Description : What are the characteristics of Continuous and Comprehensive Evaluation ? (a) It increases the workload on students by taking multiple tests. (b) It replaces marks with grades. (c) It evaluates every aspect of the student. (d) It helps in ... ) and (d) (C) (a), (b) and (c) (D) (b), (c) and (d)

Last Answer : Answer: D

There are 200 questions on a 3 hour examination. Among 200 questions,50 are from Maths, 100 are in G.K, and 50 are in Science. He spent twice as much as time on each Mathematics question as for each other question. How many minutes did he spend on Mathematics question?

Description : There are 200 questions on a 3 hour examination. Among 200 questions,50 are from Maths, 100 are in G.K, and 50 are in Science. He spent twice as much as time on each Mathematics question as for each other ... minutes did he spend on Mathematics question? a) 100 b) 60 c) 36 d) 72 e) None of these

Last Answer : Ratio of questions on Mathematics and others =50 : 150 =1 : 3 Ratio of time spent on Mathematics and other questions = (1 × 2) : (3 × 1) = 2 : 3 Time spent on Mathematics =2/5 × 180 minutes =72 minutes Answer: d)

750 families with 3 children were selected randomly and the following data recorded If a family member is chosen at random, compute the probability that it has : -Maths 9th

Description : 750 families with 3 children were selected randomly and the following data recorded If a family member is chosen at random, compute the probability that it has : -Maths 9th

Last Answer : (i) P(no boy child) =100 / 750 = 2 / 15 (ii) P (no girl child) = 120 /750 =4 / 25

750 families with 3 children were selected randomly and the following data recorded If a family member is chosen at random, compute the probability that it has : -Maths 9th

Description : 750 families with 3 children were selected randomly and the following data recorded If a family member is chosen at random, compute the probability that it has : -Maths 9th

Last Answer : (i) P(no boy child) =100 / 750 = 2 / 15 (ii) P (no girl child) = 120 /750 =4 / 25

If three natural numbersfrom 1 to 100 are selected randomly, then the probability that all are divisible by both 2 and 3 is -Maths 9th

Description : If three natural numbersfrom 1 to 100 are selected randomly, then the probability that all are divisible by both 2 and 3 is -Maths 9th

Last Answer : (c) \(rac{4}{1155}\)Let n(S) = Number of ways of selecting 3 numbers from 100 numbers = 100C3 Let E : Event of selecting three numbers divisible by both 2 and 3 from numbers 1 to 100 = Event of selecting three ... C_3}{^{100}C_3}\) = \(rac{16 imes15 imes14}{100 imes99 imes98}\) = \(rac{4}{1155}\).

6 boys and 6 girls are sitting in a row randomly. The probability that boys and girls sit alternately is -Maths 9th

Description : 6 boys and 6 girls are sitting in a row randomly. The probability that boys and girls sit alternately is -Maths 9th

Last Answer : (b) \(rac{1}{462}\)Let S be the sample space. Then, n(S) = Number of ways in which 6 boys and 6 girls can sit in a row = 12! Let E : Event of 6 girls and 6 boys sitting alternately. Then, the ... )= \(rac{2 imes6 imes5 imes4 imes3 imes2 imes1}{12 imes11 imes10 imes9 imes8 imes7}\) = \(rac{1}{462}\).

Three letters are randomly selected from the 26 capital letters of the English alphabet. -Maths 9th

Description : Three letters are randomly selected from the 26 capital letters of the English alphabet. -Maths 9th

Last Answer : (d) \(rac{36}{1001}\)Required probability = \(rac{P( ext{2 blue balls}) imes{P}( ext{2 red balls})}{P( ext{4 balls out of 14 balls})}\) + \(rac{P( ext{2 green balls}) imes{P}( ext{2 black balls})}{P( ext{4 out of 14 balls})}\)

Two decks of playing cards are well shuffled and 26 cards are randomly distributed to a player. -Maths 9th

Description : Two decks of playing cards are well shuffled and 26 cards are randomly distributed to a player. -Maths 9th

Last Answer : (b) \(rac{23}{26}\)Total number of ways in which 3 letters can be selected from 26 letters = 26C3. If A is not to be included in the choice, there are 25 letters left, so number of ways in which 3 letters can be ... 25}C_3}{^{26}C_3}\) = \(rac{25 imes24 imes23}{26 imes25 imes24}\) = \(rac{23}{26}\).

In Skill Acquisition Phase, the student teacher (a) Selects skills for practice (b) Demonstrates various teaching skills (c) Gives outline for the preparation of micro lesson plan (d) The Teacher educator explains the teaching skills with component skills

Description : In Skill Acquisition Phase, the student teacher (a) Selects skills for practice (b) Demonstrates various teaching skills (c) Gives outline for the preparation of micro lesson plan (d) The Teacher educator explains the teaching skills with component skills

Last Answer : (a) Selects skills for practice

Which one of the following statements is correct in the context of multiple - choice type questions? (A) They are more objective than true-false type questions. (B) They are less objective than essay type questions. (C) They are more subjective than short-answer type questions. (D) They are more subjective than true-false type questions.

Description : Which one of the following statements is correct in the context of multiple - choice type questions? (A) They are more objective than true-false type questions. (B) They are less objective ... than short-answer type questions. (D) They are more subjective than true-false type questions.

Last Answer : (A) They are more objective than true-false type questions.

In a medical examination of students of a class, the following blood groups are recorded : -Maths 9th

Description : In a medical examination of students of a class, the following blood groups are recorded : -Maths 9th

Last Answer : Total number of students = 10 + 13 + 12 + 5 = 40 Number of students having blood group ‘B’ = 12 Required probability =12 / 40 = 3 / 10

In a medical examination of students of a class, the following blood groups are recorded : -Maths 9th

Description : In a medical examination of students of a class, the following blood groups are recorded : -Maths 9th

Last Answer : Total number of students = 10 + 13 + 12 + 5 = 40 Number of students having blood group ‘B’ = 12 Required probability =12 / 40 = 3 / 10

In a medical examination of students of a class, -Maths 9th

Description : In a medical examination of students of a class, -Maths 9th

Last Answer : Total number of students = 10 + 13 + 12 + 5 = 40 P (a student has blood group B) = 12/40 = 3/10

In a public examination , Raghav scored twice twice Sunitha’s score. If r and s represent the scores of Raghav and Sunitha respectively , Write a linear equation in r and s representing the above situation ? -Maths 9th

Description : In a public examination , Raghav scored twice twice Sunitha’s score. If r and s represent the scores of Raghav and Sunitha respectively , Write a linear equation in r and s representing the above situation ? -Maths 9th

Last Answer : Let raghav and sunita score be r and S respectively. Sunita score=2times raghav score Therefore, s=2r

Assurance services may include which of the following? a. Attesting to financial statements b. Examination of the economy and efficiency of governmental operations c. Evaluation of a division's performance for management d. All of the given choices

Description : Assurance services may include which of the following? a. Attesting to financial statements b. Examination of the economy and efficiency of governmental operations c. Evaluation of a division's performance for management d. All of the given choices

Last Answer : All of the given choices

Three gods, A, B, and C, are called, in some order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is completely random. You must determine the identities of A, B, and C by asking three yes-or-no questions, and each question must be posed to exactly one god. The gods understand English, but will answer all questions in their own language. In their unknown language, the words for 'yes' and 'no' are 'da' and 'ja', in some order. You do not know which word means which. So, which questions would you ask to identify each god? And no, it’s not a trick question. As a matter of fact, there are multiple ways to get the correct answer. -Riddles

Description : Three gods, A, B, and C, are called, in some order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is completely random. ... a trick question. As a matter of fact, there are multiple ways to get the correct answer. -Riddles

Last Answer : 1. To god A: Does da' mean yes' if and only if you are True and if and only if B is Random? (We supposed A said, ja, making B True or False). 2. To god B: Does da mean yes' if and ... only if A is Random? Since B's True, he must say da, which means A is Random, leaving C to be False.

When thecomputer provides the manager with a multiple choice of possible answers, the prompting technique is A. question and answer B. form fillingC.open-ended questionD.menu selectionE.None of the above

Description : When thecomputer provides the manager with a multiple choice of possible answers, the prompting technique is A. question and answer B. form filling C. open-ended question D. menu selection E. None of the above

Last Answer : menu selection

From the given figure, answer the following questions . -Maths 9th

Description : From the given figure, answer the following questions . -Maths 9th

Last Answer : (i) We know that, the point whose abscissa is 0 will lie on Y-axis. So, the required points whose abscissa is 0 are A, L and O. (ii) We know that, the point whose ordinate is 0 will lie on X- ... origin O is the intersection point of both axes. So, we can consider it on X-axis as well as on Y-axis.

From the given figure, answer the following questions . -Maths 9th

Description : From the given figure, answer the following questions . -Maths 9th

Last Answer : (i) We know that, the point whose abscissa is 0 will lie on Y-axis. So, the required points whose abscissa is 0 are A, L and O. (ii) We know that, the point whose ordinate is 0 will lie on X- ... origin O is the intersection point of both axes. So, we can consider it on X-axis as well as on Y-axis.

This set of Software Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Project Management”. 1. Which of the following is not project management goal? a) Keeping overall costs within budget b) Delivering the software to the customer at the agreed time c) Maintaining a happy and well-functioning development team d) Avoiding customer complaints

Description : This set of Software Engineering Multiple Choice Questions & Answers (MCQs) focuses on Project  Management . 1. Which of the following is not project management goal? a) Keeping overall ... agreed time c) Maintaining a happy and well-functioning development team d) Avoiding customer complaints

Last Answer : d) Avoiding customer complaints

What is the output of the following code AL=00110101 BL= 39H M. Krishna Kumar/IISc. Bangalore M2/V1/June 04/1 Microprocessors and Microcontrollers/Assembly language of 8086 Multiple Choice Questions SUB AL, BL AAS a) AL= 00000100, CF=1 b) BL=00000100, CF=0 c) AL=11111100 CF=1 d) BL= 00000100, CF=1

Description : What is the output of the following code AL=00110101 BL= 39H M. Krishna Kumar/IISc. Bangalore M2/V1/June 04/1 Microprocessors and Microcontrollers/Assembly language of 8086 Multiple Choice Questions SUB AL, BL AAS ... , CF=1 b) BL=00000100, CF=0 c) AL=11111100 CF=1 d) BL= 00000100, CF=1

Last Answer : b) BL=00000100, CF=0

How many synchronous and asynchronous modes are there in serial port of 8096? M. Krishna Kumar/IISc. Bangalore M5/V1/June 04/1 Microprocessors and Microcontrollers/ Multiple Choice Questions Architecture of Micro controllers a) 2, 2 respectively b) 3,1 respectively c) 1, 3 respectively d) 1, 2 respectively

Description : How many synchronous and asynchronous modes are there in serial port of 8096? M. Krishna Kumar/IISc. Bangalore M5/V1/June 04/1 Microprocessors and Microcontrollers/ Multiple Choice Questions Architecture of Micro ... 2, 2 respectively b) 3,1 respectively c) 1, 3 respectively d) 1, 2 respectively

Last Answer : c) 1, 3 respectively

The largest book, the super book, is ?? and weight is ?? General Knowledge Multiple Choice Quiz Questions A. 270 cm, 300 cm, 252 kg. B. 100 cm, 110 cm, 100 kg. C. 200 cm, 100 cm, 60 kg. D. None of these

Description : The largest book, the super book, is ?? and weight is ?? General Knowledge Multiple Choice Quiz Questions A. 270 cm, 300 cm, 252 kg. B. 100 cm, 110 cm, 100 kg. C. 200 cm, 100 cm, 60 kg. D. None of these

Last Answer : A. 270 cm, 300 cm, 252 kg.

Which of the following devices is generally used to check multiple choice questions ? (1) OCR (2) OMR (3) MICR (4) Bar Code Reader

Description : Which of the following devices is generally used to check multiple choice questions ? (1) OCR (2) OMR (3) MICR (4) Bar Code Reader

Last Answer : OMR

In a school, 22% of the students are sixth graders. What is the probability that a randomly chosen student will not be a sixth grader?

Description : In a school, 22% of the students are sixth graders. What is the probability that a randomly chosen student will not be a sixth grader?

Last Answer : 50 percent

One technique of Black Box testing is Equivalence Partitioning. In a programstatement that accepts only one choice from among 10 possible choices,numbered 1 through 10, the middle partition would be from _____ to _____ a) 4 to 6 b) 0 to 10 c) 1 to 10 d) None of the above

Description : One technique of Black Box testing is Equivalence Partitioning. In a programstatement that accepts only one choice from among 10 possible choices,numbered 1 through 10, the middle partition would be from _____ to _____ a) 4 to 6 b) 0 to 10 c) 1 to 10 d) None of the above

Last Answer : c) 1 to 10

A ______ occurs when each player selects one of his strategies a. Profit b. Decision c. Play d. Game

Description : A ______ occurs when each player selects one of his strategies a. Profit b. Decision c. Play d. Game

Last Answer : c. Play

Construct a histogram for the marks of the student given below : - Marks 0-10,10-30,30-45,45-50,50-60 and number of students 8,32,18,10,6 -Maths 9th

Description : Construct a histogram for the marks of the student given below : - Marks 0-10,10-30,30-45,45-50,50-60 and number of students 8,32,18,10,6 -Maths 9th

Last Answer : see in book okay!!!

A student wrote the equations of the lines a and b drawn in the following graph as y =1 and 2x + 3y =6. Is he right? -Maths 9th

Description : A student wrote the equations of the lines a and b drawn in the following graph as y =1 and 2x + 3y =6. Is he right? -Maths 9th

Last Answer : Clearly, line a is parallel to X-axis at a distance of 1 unit in positive direction of Y-axis, therefore its equation is y = 1. Also, if we draw the graph of line 2x + 3y = 6, then its graph should intersect X - axis at (3,0 ... Base Height = 1/2 BC AC = 1/2 1 3 / 2 = 3 / 4 sq unit.

The mean weight per student in a group of 7 students is 55 kg. -Maths 9th

Description : The mean weight per student in a group of 7 students is 55 kg. -Maths 9th

Last Answer : x̅ = 1 / n (Σxi) ⇒ 55 = x1 + x2 + .......+ ⇒ x7 / 7 ⇒ x1 + x2 + ...... + x7 = 55 × 7 = 385 x1 + x2 + ...... + x6 = 52 + 54 + 55 + 53 + 56 + 54 = 324 ∴ x7 = 385 - 324 = 61 kg ∴ weight of the seventh student is 61 kg.

In a class, there are x girls and y boys, a student is selected at random, then find the probability of selecting a boy. -Maths 9th

Description : In a class, there are x girls and y boys, a student is selected at random, then find the probability of selecting a boy. -Maths 9th

Last Answer : Number of boys = y Total students = (x + y) Thus,P(a boy)= y/(x+y)

The table shows the marks obtained by a student in unit tests out of 50 : -Maths 9th

Description : The table shows the marks obtained by a student in unit tests out of 50 : -Maths 9th

Last Answer : Here the marks are out of 50 , so we find its percentage (i.e. out of 100)

Construct a histogram for the marks of the student given below : - Marks 0-10,10-30,30-45,45-50,50-60 and number of students 8,32,18,10,6 -Maths 9th

Description : Construct a histogram for the marks of the student given below : - Marks 0-10,10-30,30-45,45-50,50-60 and number of students 8,32,18,10,6 -Maths 9th

Last Answer : see in book okay!!!

A student wrote the equations of the lines a and b drawn in the following graph as y =1 and 2x + 3y =6. Is he right? -Maths 9th

Description : A student wrote the equations of the lines a and b drawn in the following graph as y =1 and 2x + 3y =6. Is he right? -Maths 9th

Last Answer : Clearly, line a is parallel to X-axis at a distance of 1 unit in positive direction of Y-axis, therefore its equation is y = 1. Also, if we draw the graph of line 2x + 3y = 6, then its graph should intersect X - axis at (3,0 ... Base Height = 1/2 BC AC = 1/2 1 3 / 2 = 3 / 4 sq unit.

The mean weight per student in a group of 7 students is 55 kg. -Maths 9th

Description : The mean weight per student in a group of 7 students is 55 kg. -Maths 9th

Last Answer : x̅ = 1 / n (Σxi) ⇒ 55 = x1 + x2 + .......+ ⇒ x7 / 7 ⇒ x1 + x2 + ...... + x7 = 55 × 7 = 385 x1 + x2 + ...... + x6 = 52 + 54 + 55 + 53 + 56 + 54 = 324 ∴ x7 = 385 - 324 = 61 kg ∴ weight of the seventh student is 61 kg.

In a class, there are x girls and y boys, a student is selected at random, then find the probability of selecting a boy. -Maths 9th

Description : In a class, there are x girls and y boys, a student is selected at random, then find the probability of selecting a boy. -Maths 9th

Last Answer : Number of boys = y Total students = (x + y) Thus,P(a boy)= y/(x+y)

The table shows the marks obtained by a student in unit tests out of 50 : -Maths 9th

Description : The table shows the marks obtained by a student in unit tests out of 50 : -Maths 9th

Last Answer : Here the marks are out of 50 , so we find its percentage (i.e. out of 100)

The percentage of marks obtained by a student in monthly unit tests are given below. -Maths 9th

Description : The percentage of marks obtained by a student in monthly unit tests are given below. -Maths 9th

Last Answer : (i) Number of tests in which the student scored more than 70% marks = 3 ∴ P(more than 70% marks) = 3/6 = 1/2 (ii) Number of tests in which the student scored less than 70% marks = 3 ∴ P(less ... ) Number of tests in which the student scored at least 60% marks = 5 ∴ P(at least 60% marks) = 5/6

Tanya, a class IX student received cash award -Maths 9th

Description : Tanya, a class IX student received cash award -Maths 9th

Last Answer : Solution :- 1. Statistics 2. Do yourself 3. Respect for elders, kind, socially active.

The probability of guessing the correct answer to a certain question is x/ 2. -Maths 9th

Description : The probability of guessing the correct answer to a certain question is x/ 2. -Maths 9th

Last Answer : Here, probability of guessing the correct answer = x / 2 And probability of not guessing the correct answer = 2 / 3 Now, x / 2 + 2 / 3 = 1 ⇒ 3x + 4 = 6 ⇒ 3x = 2 ⇒ x = 2 / 3

The probability of guessing the correct answer to a certain question is x/ 2. -Maths 9th

Description : The probability of guessing the correct answer to a certain question is x/ 2. -Maths 9th

Last Answer : Here, probability of guessing the correct answer = x / 2 And probability of not guessing the correct answer = 2 / 3 Now, x / 2 + 2 / 3 = 1 ⇒ 3x + 4 = 6 ⇒ 3x = 2 ⇒ x = 2 / 3

Consider Student Card Choices Carefully?

Description : Consider Student Card Choices Carefully?

Last Answer : College students are regularly courted by credit card companies who hope to gain loyal customers. Credit card companies also know that college students spend money - in restaurants, movie theaters, ... rates. However, some of the interest rates are low introductory rates that climb significantly on

A question paper has two parts A and B, each containing 12 questions. If a student needs to choose 10 from part A and 8 from part B, in how many ways can he do that? A) 32670 B) 36020 C) 41200 D) 29450

Description : A question paper has two parts A and B, each containing 12 questions. If a student needs to choose 10 from part A and 8 from part B, in how many ways can he do that? A) 32670 B) 36020 C) 41200 D) 29450

Last Answer : Answer: A)  Number of ways to choose 10 questions from part A = 12C10  Number of ways to choose 8 questions from part B = 12C8  Total number of ways= 12C10 × 12C8  = 12C2 × 12C4 [∵ nCr = nC(n-r)]  ={12×11}/{2×1}X{12×11×10×9} / {4×3×2×1}  =66×495 =32670

Check whether p(x) is a multiple of g(x) or not -Maths 9th

Description : Check whether p(x) is a multiple of g(x) or not -Maths 9th

Last Answer : p(x) is a multiple of g(x) or not

Check whether p(x) is a multiple of g(x) or not -Maths 9th

Description : Check whether p(x) is a multiple of g(x) or not -Maths 9th

Last Answer : p(x) is a multiple of g(x) or not

Check whether polynomial p(x) = 2x(cube) - 9x(square) + x + 12 is a multiple of 2x-3 or not. -Maths 9th

Description : Check whether polynomial p(x) = 2x(cube) - 9x(square) + x + 12 is a multiple of 2x-3 or not. -Maths 9th

Last Answer : Solution :-