SOLUTION
The probability percentage of a curve is defined as the area under the density curve as
[tex]P=\int_b^ae^{f(x)}dx=A[/tex]The area under the density curve from 60 inches to 70 inches is 0.75.
So, the probability is the area = 0.75
Hence the probability of someone's height being anywhere from 60 to 70 inches is 75%
option D is the answer
