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View Full Version : Finite math help


rhouse1
May 9, 2012, 06:40 PM
The life span of a certain type of car timing belt, calculated in miles, is normally distributed, with a mean of 70,000 miles and a standard deviation of 7000 miles. If the maker of the timing belt wants less than 4% of the belts to fail while under warranty, for how many miles should the timing belt be guaranteed?