The average of 11 results is 50. If the average of first 6 results is 49 and that of last 6is 52, find the sixth result? A.55 B.56 C.65 D.62 E.None of these

The average of 11 results is 50. If the average of first 6 results is 49 and that of last 6is 52, find the sixth result? A.55 B.56 C.65 D.62 E.None of these
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1 Answer

Answer :

Answer – B (56)

Explanation – The total of 11 results = 11 x 50 = 550

The total of first 6 results = 6 x 49 = 294

The total of last 6 results = 6 x 52 = 312

The sixth result is common to both:

Sixth result = 294 + 312 – 550 = 56
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10 years ago the average age of all the 25 teachers of a college was 45 years. 4 years ago, a teacher retired from the post at the age of 60 years, and was replaced by a new teacher whose age was 54 years. What is the present average age of all the teachers? a) Between 52 and 53 b) Between 53 and 54 c) Between 54 and 55 d) Between 55 and 56 e) None of the above

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15 17 32 49 81 130 ? a) 179 b) 211 c) 194 d) 226 e) None of these

Description : 15 17 32 49 81 130 ? a) 179 b) 211 c) 194 d) 226 e) None of these

Last Answer : 15 + 17 = 32 17 + 32 = 49 32 + 49 = 81 49 + 81 = 130 81 + 130 = 211 Answer: b)

121 ? 113 138 89 170 49 a) 125 b) 110 c) 122 d) 120 e) 133

Description : 121 ? 113 138 89 170 49 a) 125 b) 110 c) 122 d) 120 e) 133

Last Answer : The series is +1^2 , -3^2 , +5^2 , - 7^2 , .... Answer: c)

√(4.9 − 0.49) = ? a) 10.42 b) 5.84 c) 12.84 d) 2.1 e) None of these

Description : √(4.9 − 0.49) = ? a) 10.42 b) 5.84 c) 12.84 d) 2.1 e) None of these

Last Answer : Answer: d)

3 9 15 ? 35 49 a) 25 b) 30 c) 24 d) 20 e) None of these

Description : 3 9 15 ? 35 49 a) 25 b) 30 c) 24 d) 20 e) None of these

Last Answer : Answer: a) 

. What is the ratio of the total investment in Metals to that in Machinery? a) 135 : 302 b) 24 : 49 c) 2 : 4 d) 197 : 226 e) 123 : 233

Description : . What is the ratio of the total investment in Metals to that in Machinery? a) 135 : 302 b) 24 : 49 c) 2 : 4 d) 197 : 226 e) 123 : 233

Last Answer : d) 197 : 226

Nishu is standing on a railway bridge which is 180 m long. He finds that a train crosses the bridge in 20 seconds but himself in 8 seconds. Find the speed of the train? A.35 kmph B.54 kmph C.62 kmph D.70 kmph E.None of these

Description : Nishu is standing on a railway bridge which is 180 m long. He finds that a train crosses the bridge in 20 seconds but himself in 8 seconds. Find the speed of the train? A.35 kmph B.54 kmph C.62 kmph D.70 kmph E.None of these

Last Answer : Answer - B (54 kmph) Explanation - Let the length of the train be x metres. Then, the train covers x metres in 8 seconds (train is actually covering itself because length of man is very less compartable to train)and (x + ... /8]m/sec (convert to km/hr i.e x 18/5) =[120/8] x 18/5kmph = 54 kmph.

In a bag there arc coins of 25 paise and 10 paise in the ratio of 6 : 17. If the bag contains Rs. 16 then the number of 10-paise coins is a) 30 b) 40 c) 70 d) 85 e) 65

Description : In a bag there arc coins of 25 paise and 10 paise in the ratio of 6 : 17. If the bag contains Rs. 16 then the number of 10-paise coins is a) 30 b) 40 c) 70 d) 85 e) 65

Last Answer : d) 85

Mr. Xavier invested a certain amount in Debit and Equity funds in the ratio of 4 : 5 respectively. At the end of one year, he earned a total dividend of 30% on his investment. After one year he reinvested the amount including dividend in the ratio of 6 : 7 in Debt and Equity Funds. If the amount reinvested in Equity Funds was Rs. 94,500/-, what was the original amount invested in Equity Funds? (a) Rs. 75,000/- (b) Rs. 81,000/- (c) Rs. 60,000/- (d) Rs. 65,000/- (e) None of these

Description : Mr. Xavier invested a certain amount in Debit and Equity funds in the ratio of 4 : 5 respectively. At the end of one year, he earned a total dividend of 30% on his investment. After one year he reinvested the amount including ... . 81,000/- (c) Rs. 60,000/- (d) Rs. 65,000/- (e) None of these

Last Answer : (a) Rs. 75,000/-