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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.

Correct Answer: 25/34

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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