Question 1012410
It has been reported that a third of all credit card users pay their bills in full each month. 
10 credit card users are selected. What is the probability that 
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Binomial Problems with n = 10 and p(pay) = 1/3 ; p(not pay all) = 2/3
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(a)none of them pay their bills in full each month
Ans: P(x = 0) = (2/3)^10 = 0.0173
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(b)one of them pays their bills in full each month
P(x = 1) = 10C1*(1/3)(2/3)^9 = binompdf(10,1/3,1) = 0.0867
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(c)at least two of them pay their bills in full each month?
P(2<= x <=10) = 1 - binomcdf(10,1/3,1) = 0.896
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Cheers,
Stan H.
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