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Assume that a researcher randomly selects 14 newborn babies and count the number of girls, X. The probabilities corresponding to the 14 possible values of X are summarized in the given table. Answer the questions using the table. Find the probability of selecting exactly 3 girls.

A. 0.022
B. 0.122
C. 0.001
D. 0.061

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1 answer

  1. No idea what "tables" you are talking about, don't need any

    prob(girl) = 1/2
    prob(not a girl) = 1-1/2 =1/2

    prob(exactly 3 girls in 14)
    = C(14,3) (1/2)^3 (1/2)^11
    = 364(1/2)^14 = appr. .0222

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