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Fifteen items or less: The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution.

Fifteen items or less: The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution. X 0 1 2 3 4 U P(x 0.10 0.20 0.30 0.25 0.10 0.05

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