Algebra

If Buster Posey gets on base 45% of the time, what's the probability he will get on 5 out of 7 times at bat?

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asked by Mary
  1. prob on base = .45
    prob not on base = .55

    prob (on base 5 of 7 times)
    =C(7,5) (.45^5)(.55^2)
    = appr .117

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    posted by Reiny

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