Question

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

Answer 1

Answer:

The answer is 89.

Step-by-step explanation:

In order to determine the score that she needs, we have to know about the mean. The mean is the average that we use frequently, where we add up all the numbers and then divide by the amount of numbers.

We have to make a equation where let be x the fourth score. Then:

First score=108

Second score=72

Third score=95

Fourth score=x

Average (mean)=91

Amount of numbers=4

$\frac{108+72+95+x}{4} =91\\275+x=91*4\\x=364-275\\x=89$

Finally, the score that she will need is 89.

Answer 2

She needs a score of 89 for it to be an average of 91.00