A class consists of 50 students 20 of them are girls and 30 are boys If 15 of them are rich and the ...........

Quantitative Aptitude (CDS) Probability

A class consists of 50 students, 20 of them are girls and 30 are boys. If 15 of them are rich and the remaining poor and also 10 of them are intelligent then the probability of selecting an intelligent rich boy is?

1/250

9/250

1/9

1/2

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Explanation:

Total students = 50 , boys = 30 , girls = 20 , rich = 15 , intelligent = 10
Therefore the probability of selecting an intelligent rich boy is
= 30/50 × 15/50 × 10/50
= 9/250