After 5 tests Nora's average test score was 79. After she scored 85 on the sixth test, what was her new average?

An average score of 79 after 5 tests means

Total score after five tests

= (Average score)*(Number of test) = 79*5 = 395

Score in sixth test = 85

Therefor: Total score after 6 tests

= Total score of first 5 tests + score of sixth test = 395 + 85 = 480

New average score after sixth test

= (Total score of 6 tests)/6 = 480/6 = 80

Answer:

New average score = 80