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28 December, 21:21

Forty-three percent of marriages end in divorce. you randomly select 15 married couples. find the probability exactly 5 of the marriages will end in divorce.

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  1. 28 December, 21:31
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    The conditions are suitable to be modelled using a binomial distribution.

    p=0.43

    n=15

    x=5

    P (x=5)

    =C (15,5) * 0.43^5 * (1-0.43) ^ (15-5)

    =15! / (5! (15-5) !) * 0.43^5 * (1-0.43) ^ (15-5)

    =3003*0.0147008*0.003620333

    =0.1598
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