Question

A class consists of 80 students, 25 of them
are girls and 55 boys. If 10 of them are
rich and the remaining poor and also 20
of them are intelligent and others are not,
then probability of selecting an intelligent
rich girl is:
(a) 128 (b) 35 (c) 512 (d) none of these
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Answer 1

d. none of these because