baileycosby5512 baileycosby5512

25-03-2022
Mathematics

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Chloe has taken four tests this semester. Her scores on the three tests are 87, 78, and 61. If her test average is 78.5, what is her grade on her 4th test?

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isalep93 isalep93

25-03-2022

n = last test

(87 + 78 + 61 + n) : 4 = 78,5

87 + 78 + 61 + n = 78,5 x 4

n = 314 - 226

n = 88

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