A bank has a drive-through service. The number of customers arriving during a 15-minute period is distributed
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Number of customers X 2 4 Probability P(X) 012 0.20 0.3 0.25 0.12
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X PX 0012 1020 2031 3025 012 205 or 21 2 X 2 PX 2 0 2 ...View the full answer
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