Asked by sam


After six biology tests, Ruben has a mean score of 73. What score does Ruben need on the next test to raise his average (mean) to 75?
Answered by Reiny
let that score be x

solve for x
(6(73) + x)/7 = 75
Answered by Enzo
73x6=438

(438+X)/7=75

438X=75

X=87
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