A recent survey found that the ages of workers in a factory are distributed as follows: -Maths 9th

A recent survey found that the ages of workers in a factory are distributed as follows: -Maths 9th
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Total number of workers = 38 + 27 + 86 + 46 + 3 = 200  (i) P (person is 40 years or more) = P (Person having age 40 to 49 years) + P (person having age 50 to 59 years)  + P (person having age 60 and above)  = 86/200 + 46/200 + 3/200 = 135/200 = 0.675 = 0.68 (ii) P (person is under 40 years) = P (person having age 20 to 29 years)  + P (person having age 30 to 39 years)   = 38/200 + 27/200 = 65/200 = 0.325 = 0.33 (iii) P (person having age under 60 but over 39 years)  = P (person having age 40 to 19 years)  + P (person having age 50 to 59 years)  = 86/200 + 46/200 = 132/200 = 0.66
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