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David’s scores on the first three of four 100-point math tests were 86, 92, and 89. What score does he need on his fourth math test to ensure an average score of at least 90?
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Dec 19, 2018
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David’s scores on the first three of four 100-point math tests were 86, 92, and 89. What score does he need on his fourth math test to ensure an average score of at least 90?
Mathematics
high-school
Dorkmania
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David needs at least a 93 to get an average score of 90.
86+ 92+ 89+ 93= 360
360/4= 90
Febi M Felix
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Dec 25, 2018
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Febi M Felix
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