Going into the final exam, which will count as two tests, Brandi has test scores of 75, 80, 74, 63, and 92. What score does Brandi need on the final in order to have an average score of 80?

Do 480 divided by six. She took six tests, so in order to find a average you need to do 480 (74+80+75+63+92+96) divided by six which will equal EXACTLY 80.

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varshamittal029 varshamittal029 · Answer 2 · 2022-06-11T01:21:50+02:00

Brandi needs to make 88 on the final to have an average score of 80.

What is average ?

Average is a value which represents a large list of values. Average is the sum of all numbers of a list divided by the total count of the numbers present in the list.

How to find the score ?

Let, x be Brandi's final exam score.

Average = (Sum of all test scores)/(Number of tests)

Brandi has given 5 tests already and the final exam will count as two tests and scores count same in both.

Needed average score is 80

∴ 80 = (75+80+74+63+92+x+x)/7

⇒ 80×7 = (384+2x)

⇒ 2x = 560-384

⇒ 2x = 176

⇒ x = 88

Hence, Brandi needs to make 88 on the final.

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Going into the final​ exam, which will count as two​ tests, Brandi has test scores of 75, 80, 74, 63, and 92. What score does Brandi need on the final in order to have an average score of​ 80?

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What is average ?

How to find the score ?

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Going into the final exam, which will count as two tests, Brandi has test scores of 75, 80, 74, 63, and 92. What score does Brandi need on the final in order to have an average score of 80?