A class consists of 50 students, 20 of them are girls and boys, 10 them are rich and remaining poor, 5 of them are fair complxioned, 3 are intelligent. What is the probability of selecting a fair complexioned rich intelligient girl?

Answer 1

Proofread your questions before you post them.

"20 of them are girls and boys"?

I will asume 20 are girls and 30 are boys.

P(fair) = 5/50
p(rich) = 10/50
p(IQ) = 3/50
P(girl) = 20/50

Probability of all events occurring is found by multiplying the individual probabilities.

Answer 2

.25
.125
.312
.687