Question
1. Customers at a gas station pay with choice A: a credit card, choice B: a debit card, or choice C: contact less payment(Google Pay, Apple Pay, etc). Assume that successive customers make independent choices, with P(A)=0.45, P(B)=0.35,and P(C)= 0.2. Among the next 50 customers, what are the mean and variance of the n
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