SOLUTION: A quarter of the shoppers in a store have a loyalty card. Calculate the probability that of the next seven shoppers to check out of the store, exactly three have a loyalty card. Gi

Algebra ->  Probability-and-statistics -> SOLUTION: A quarter of the shoppers in a store have a loyalty card. Calculate the probability that of the next seven shoppers to check out of the store, exactly three have a loyalty card. Gi      Log On


   

Question 878266: A quarter of the shoppers in a store have a loyalty card. Calculate the probability that of the next seven shoppers to check out of the store, exactly three have a loyalty card. Give your answer as a decimal to three places.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(card) = .25, n = 7
P(x = 3) = 7C3(.25)^3(.75)^4 0r binompdf(7,.25,3) = .1730 0r 17.3%