Question

Student buys, in average, 15 coffee cups per 15 mins from the store. The total cost for each coffee cup is 1.2 CAD and it is sold for the student at 1.6 CAD

1. The probability that 30 cups is sold within 15 min

2. The probability that more than 5 cups is sold within 2 mins

I think it's poisson Distribution question. And have to use binomial distribution to solve it.

Can you give me detailed explainations ?

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