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The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution. x P(x) 0 0.05

The number of customers in line at a supermarket express checkout counter is a random variable with the following probability distribution. x P(x) 0 0.05 1 0.3 2 0.3 3 0.2 4 0.1 5 0.05 Find the probability that at least three people are in line

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