Asked by Anonymous

The mean of a set of four test scores is 85. If three of the test scores are 81,83, and 85, what is the fourth test score?
A. 89
B. 87
C. 91
D. 85
Is the answer A?
Thank you
Answered by Jai
No it isn't A.
First, we get the total or sum of the four test scores by multiplying the mean by 4:
85 * 4 = 340
Then, we subtract this by the sum of the other three given test scores to find the fourth:
340 - (81 + 83 + 85) = ?

hope this helps~ `u`
Answered by Anonymous
Oh ok thank you.
Answered by Ellis Edwards
176
Answered by Sid.V
91
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