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March 30, 2017

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Forty-four percent of customers who visit a department store make a purchase. The probability, rounded to four decimal places, that in a random sample of 9 customers who will visit this department store, exactly 6 will make a purchase is:

  • statistics - ,

    P(x = 6) = nCx *p^x (1-p)^n-x

    9C6(.44)^6(1-.44)^n-x

    9C6(.44)(.56)^3

    = 0.1070

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