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The time to complete the construction of a soapbox derby car is normally distributed with a mean of three hours and a standard deviation of

The time to complete the construction of a soapbox derby car is normally distributed with a mean of three hours and a standard deviation of one hour. Find the probability that it would take exactly four hours to construct a soapbox derby car. O 0.0227 O 0.4772 O 0.9772 OO

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