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Suppose that the amounts that students at a college spend on textbooks this semester have a normal curve with mean ? (mu) = $360 and standard deviation ? = $120.

What is the probability that a randomly selected student spends less than $450 on textbooks this semester?

What is the probability that a randomly selected student spends more than $240 on textbooks this semester?

What is the probability that a randomly selected student spends between $240 and $450 on textbooks this semester?

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