The mean life of a pair of shoes is 40 months with a standard deviation of 8 months.If the life of the shoes is normally distributed,how many pairs of shoes out of one million will need replacement before 36 months?
A) 500,000
B) 808,500
C) 191,500
D) 308,500

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The Answer of The mean life of a pair of shoes is 40 months with a standard deviation of 8 months.If the life of the shoes is normally distributed,how many pairs of shoes out of one million will need replacement before 36 months?
A) 500,000
B) 808,500
C) 191,500
D) 308,500

The Mean Life of a Pair of Shoes Is 40