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 value between 690,000 and 700,000

A value between 808,500 and 809,500

A value between 190,000 and 192,000

A value between 308,500 and 309,000

None of the above