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# 12 persons are chosen at random from a group of 30 men, 20 women, 15 children. Find the probability that out of 12 choice, exactly 4 are children.

SHAIK AASIF AHAMED
6 years ago
Hello student,
Probability that out of 12 choice exactly 4 are children is
=$\frac{15c4(30c1*20c7+30c2*20c6+30c3*20c5+30c4*20c4+30c5*20c3+30c6*20c2+30c7*20c1)}{65c12}$
Thanks and Regards
Shaik Aasif