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10 January, 07:36

If a 4 member comittee is formed from 3 girls and 6 boys in a club how many commitees can be formed?

Iifthe members if the commitee are chosen at random, find the probability that the comittee consist of ... 2 girls & 2 boys?1girl& 3boys

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  1. 10 January, 09:22
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    1. 9! / (5! * 4!) = (6*7*8*9) / (1*2*3*4) = 2*7*9 = 126;

    2. a) [ (3! / (1!*2!) ]*[ (6! / (4!*2!) ]/126 = 5/14 = 0.35;

    b) [ (3! / (2!*1!) ]*[ (6! / (3!*3!) ]/126 = 10/21 = 0.47;
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