Question

a student has taken 6 tests and received scores of 88, 73, 81, 80, 79, and 94. the seventh test is coming up and the student wants to know what score is needed on the seventh test to have a mean score of 83. determine the score the student needs. show your work.

Answer 1

Let the score for the seventh test be represented below as

`=x`

The mean score t be attained after the sevent tests is

`mean=83`

The scores from the 6 tests are given below as

`88,73,81,80,79,94`

To figure out the seventh score, we will do the calculation below

`\begin{gathered} mean=\frac{additionofthescores}{number\text{ of tests}} \\ 83=(88+73+81+80+79+94+x)/(7) \\ 83=(495+x)/(7) \\ cross\text{ multpily} \\ 83*7=495+x \\ 495+x=581 \\ x=581-495 \\ x=86 \end{gathered}`

Hence,

The final asnwer is

`\Rightarrow86`