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Furnace repair bills are normally distributed with a mean of 264 dollars and a standard deviation of 30 dollars. If 144 of these repair bills

Furnace repair bills are normally distributed with a mean of 264 dollars and a standard deviation of 30 dollars. If 144 of these repair bills are randomly selected, find the probability that they have a mean cost between 264 dollars and 266 dollars

0.2881

0.5517

0.7881

0.2119

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