#### Answer

Weighted mean is used to find a person's grade point average because different subjects have varying weights or credits assigned to them.
Refer to the example provided below.

#### Work Step by Step

Weighted mean is used to find a person's grade point average because different subjects have varying weights or credits assigned to them.
Refer to the table below for an example.
To solve for the grade point average, perform the following steps:
(1) Multiply each grade to its corresponding credits.
(2) Add the results in Step (1).
(3) Divide the result in Step (2) by the total of the credits.
Thus, in the example below, the grade point average is:
$=\dfrac{54}{16}\approx 3.38$