Arithmetic Ability
 Probability

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Q.

Out of 17 applicants 8 boys and 9 girls. Two persons are to be selected for the job. Find the probability that at least one of the selected persons will be a girl.

View Answer

Correct choice: D

Explanation:

The events of selection of two person is redefined as first is a girl and second is a boy or first is boy and second is a girl or first is a girl and second is a girl. So the required probability: =(8/17*9/16)+(9/17*8/16)+(8/17*7/16) = 9/34+9/34+7/34 = 25/34
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