Question

After 5 tests Dara's average score was 88 what score must she average on the next two tests to have a seven-test average of 90?

Answer 1

After 5 tests, her average was 88. To have a seven-test average of 90, the total must be:

`90 * 7 = 630`

Her average after 5 tests was 88. Her total score on the 5 tests is:

`88 * 5 = 440`

Subtract:

`630-440 = 190`

Find the average by dividing by 2:

`190 / 2 = 95`

Her average must be 95