# SOLUTION: Sixty percent of the customers of a fast food chain order a hamburger, french fries and a drink. If a random sample of 15 cash register receipts is selected, what is the probabilit

Algebra ->  Algebra  -> Probability-and-statistics -> SOLUTION: Sixty percent of the customers of a fast food chain order a hamburger, french fries and a drink. If a random sample of 15 cash register receipts is selected, what is the probabilit      Log On

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 Click here to see ALL problems on Probability-and-statistics Question 199933: Sixty percent of the customers of a fast food chain order a hamburger, french fries and a drink. If a random sample of 15 cash register receipts is selected, what is the probability that 10 or more will show that the above three food items were ordered?Answer by edjones(7569)   (Show Source): You can put this solution on YOUR website!Let a=.6 and b=.4 Take the 1st six terms of (a+b)^15 which are find the coefficients by the combination formula nCr on your calculator (easiest). a^15=.0005 15a^14b=.0047 105a^13b^2=.0219 455a^12b^3=.0634 1365a^11b^4=.1268 3003a^10b^5=.1859 Sum of the above numbers .4032 answers. . Ed