A class consists of 100 students, 25 of them are girls and 75 boys. 20 of them are rich and remaining poor. 40 of them are fair complexioned. What is probability of selecting a fair complexioned rich girl?

0.85

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0.02

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0.24

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0.64

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Solution

The correct option is B 0.02
Sample space= 100
A- event of getting a girl
P(A) = 25/100
B= event of getting a rich person
P(B) = 20/100
C= event of getting a fair complexioned
P(C) = 40/100
Therefore, the event of getting a fair complexioned rich girl will be
P(ABC) = P(A) P(B) P(C)
= (25/100) x ( 20/100) x (40/100)
= 0.02

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