Question

When Sally went bowling, her average scores were 108, 72, and 95 If she bowls a 4th game, what will her score need to be to give her and average of 91?


Pls hurry! I need a full explanation!!

Answer 1

An average is the sum of the scores divided by the number of games played.

For her average to be 91 after 4 games the total of the scores needs to be 91 x 4 = 364

To find what her 4th score needs to be subtract her first 3 scores from 364

364 - 108 - 72 - 95 = 89

Her 4th game needs to be 89

Answer 2

Her score will need to be 89