Question

A Computer Science class of BS-I contains 15 girls and 20 boys of which half the girls

and half the boys read Statistics in intermediate. Find the probability that a student chosen at

random is girl or has Statistics .

Answer 1

All girls and half the boys satisfy the condition, so the probability that a student chosen at random is girl or has Statistics is $P = \frac{15 + 10} {35} = 0.7143$ or 71.43%.