SOLUTION: a passenger luxury liner has 500 passengers whose ages are normally distributed around the mean of 60 with a standard deviation of 12years .how many passengers are : (A)between 48

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Question 1126811: a passenger luxury liner has 500 passengers whose ages are normally distributed around the mean of 60 with a standard deviation of 12years .how many passengers are :
(A)between 48 and 72 years old?
(B)older than 72 years
(C) younger than 48 years
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
48 years = 1 std. dev. below mean
72 years = 1 std. dev. above mean

a) within 1 std. dev. --> 68.2%
b) greater than 1 std. dev. --> 15.9%
c) less than 1 std. dev. --> 15.9%