statistics
posted by Tom .
Fortyfour 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:

P(x = 6) = nCx *p^x (1p)^nx
9C6(.44)^6(1.44)^nx
9C6(.44)(.56)^3
= 0.1070
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