Question

Emma's final grade in her math class is the average (mean) of her 5 chapter tests she took throughout the year. If she received a 92%, 85%, 78%, 97%, and 88% on the five tests, what is her final grade?​

Answer 1

Explanation:

The mean (or average) of a set of numbers can be found with the following formula:

`Mean = (A_(1) + A_(2) + ... + A_(N))/(N)`

For this problem, we have five numbers, so we add them together and divide by 5:

`Mean = (92 + 85 + 78 + 97 + 88)/(5)`

`Mean = (440)/(5)`

`Mean = 88`

Answer 2

88%

Explanation:

Emma took tests of her 5 chapters throughout the year.

She received the score on the five tests

92%, 85%, 78%, 97% and 88%

We have to calculate the average (mean) of her final grade.

average =
`\frac{\text{addition of all grades}}{\text{total number of tests}}`

=
`(92+85+78+97+88)/(5)`

=
`(440)/(5)`

= 88%

Her final grade would be 88%.