Please try to type the question more carefully.

I will answer this question:

"Suppose X is a random variable best described by a probability distribution given as:

f(x) = 1/25 , 20 <= x <= 45.

f(x) = 0 otherwise"

Then has a uniform distribution on , or . Now we

can calculate the mean as:

or we can use the fact that we know that the mean is the midpoint of the

interval or:

RonL