The longevity of people living in a certain locality has a standard deviation of 14 years. What is the mean longevity if 30% of the people live longer than 75 years? Assume a normal distribution for life spans.
(A)75 - 0.30(14) (B)75 + 0.30(14) (C)75 - 0.4756(14) (D)75 - 0.5244(14)
D