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Please help me understand this, i've been stuck on this question

Please help me understand this, i've been stuck on this question
asked 198k views
1 vote
Please help me understand this, i've been stuck on this question

Please help me understand this, i've been stuck on this question-example-1
asked
User Yishu Fang
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8.0k points

1 Answer

6 votes
A is correct.
to find the average, you add up all three test scores, divide the sum by 3
85≤(83+91+n)/3≤90

multiply 3 to eliminate the fraction: 255≤(174+n)≤270
subtract 174: 81≤n≤96
answered
User Jake Long
by
7.8k points
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