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Question: If the life of a car engine, calculated in miles, is normally distributed, with a mean of 240,000 miles & a standard deviation of 10,500 miles, what should be the guarantee period if the company wants less than 2 percent of the engines to fail while under warranty?

[A] Less than 231,180 miles

[B] Less than 218,370 miles

[C] Less than 261,630 miles

[D] Less than 209,760 miles

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