Question

Mildred has seven grades on her report card. The overall average of these grades is 77%. After looking more closely at her report card, Addie realizes that her English grade was incorrectly recorded as 18% instead of 81%. What is Mildred's actual report card average

Answer 1

85.86%

Explanation:

average=sum of numbers/number of numbers

Answer 2

Mildred’s corrected report card average is 86%.

Explanation:

First we will add the seven grades and divide by 7, to get the average.

`(SumOfSevenGrades)/(7) =77`

=> Sum Of Seven grades = 539

Now, in this sum the English marks are added wrong. So we will adjust the sum by subtracting the wrong grade and adding the corrected grade.

Correct sum of seven grades =
`539-18+81 = 602`

Correct average =
`(602)/(7) =86`

Therefore, Mildred’s corrected report card average is 86%.