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80% of the American population likes pizza. If 8 Americans are chosen at random, find the probability that 6 of them like pizza.

  • math -

    n=8, p=.80, q=1-.80=0.20, x=6

    P(x)=nCxPxQn-x

    P(x)=8C6(0.80)6(0.20)2

    = (28)x(0.262144)x(0.04)

    =0.294

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