Suppose the round-trip airfare between Philadelphia and Los Angeles a month before the departure date follows the normal probability distribution

Question:

Suppose the round-trip airfare between Philadelphia and Los Angeles a month before the departure date follows the normal probability distribution with a mean of $387.20 and a standard deviation of $68.50. What is the probability that a randomly selected airfare between these two cities will be between $325 and $425?

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To find the probability that a randomly selected airfare between Philadelphia and Los Angeles will b

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