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30-03-2020
Mathematics

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John knows that his first 4 tests grades were 84, 79, 82, and 88. Find John's grade on the test if his average was 83.8.

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MathPhys MathPhys

30-03-2020

Answer:

86

Step-by-step explanation:

The average is the sum of all the grades divided by the number of tests.

83.8 = (84 + 79 + 82 + 88 + x) / 5

419 = 333 + x

x = 86

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