Question

Use 40, 37, 30, 40, 39, 41, 38, n.

1. If the mean was 43, n = ____
2. If the mean was 40, n = ____
3. If the mean was 38, n = ____

Answer 1

`40 + 37 + 30 + 40 + 39 + 41 + 38 + n = 265 + n`

1)

`(265 + n)/(8) = 43`

`265 + n = 344`

`n = 79`

2)

`(265 + n)/(8) = 40`

`265 + n = 320`

`n = 55`

3)

`(265 + n)/(8) = 38`

`265 + n = 304`

`n = 39`