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The average (arithmetic mean) of Huajie’s six test scores is 89. What must he score on his seventh test to average a score of 90 on all seven tests?

 Mar 31, 2021
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89*6 = total score at beggining which is 534

 

has to get to 90*7 which is 630 points total

 

You take 630-534 which is 96.

 

So he has to get a 96.

 Mar 31, 2021

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