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Verizon [17]
3 years ago
7

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?
Mathematics
2 answers:
coldgirl [10]3 years ago
6 0

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 <em>mean </em>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.

barxatty [35]3 years ago
4 0
She needs a score of 89 for it to be an average of 91.00
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