Question 175079
Your grades on five math tests are 95,86,79,88,83. What grade do you need on the sixth test to have an average of 90%.
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Let the grade on the 6th test be "x".
EQUATION:
(95+86+79+88 + 83 + x)/6 = 90
431 + x = 540
x = 109
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You would need a grade of 109 on the 6th test.
Cheers,
Stan H.