After five science tests Sonyas average score is 89 If she g

After five science tests, Sonya’s average score is 89. If she gets a 95 on the sixth test, what is her new average?

A. 89.50

B. 89.90

C. 90.00

D. 90.50

Solution

C. If Sonya’s average over five tests is 89, she has earned a total of 445 points for the five tests. If she received a 95 on the sixth test, that brings her total points to 540. Dividing that by the six tests gives a new average of 90.