Asked by McKinsley
From experience, the manager of a bookstore knows that 40% of the people browsing in his store will make a purchase. If on a certain day, 360 people come into the store
a) what is the probability that exactly 144 of them make a purchase?
b) what is the probability that at more 120 make a purchase?
a) what is the probability that exactly 144 of them make a purchase?
b) what is the probability that at more 120 make a purchase?
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