# Question #58874

##### 1 Answer

#### Explanation:

The question requires z-scores.

The formula is:

Where

Or

This is a bit easier to remember :)

(SD=Standard Deviation)

Plug in the values:

Now you look up the probability that corresponds to the

The probability that corresponds to each

You subtract

Which is

All you have to do now is multiply by

Below is a picture that illustrates the concept better: