jen1295 jen1295

30-10-2019
Mathematics

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Ali has scored 88, 94, 82, and 83 on his previous four tests. What score does he need on his next test so that his average (mean) is 86?

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KurdishPotato KurdishPotato

30-10-2019

Answer:

83

Step-by-step explanation:

(94 + 88 + 82 + 83 + x) ÷ 5 = 86

(347 + x) ÷ 5 = 86

347 + x = 86 × 5 ➡ 347 + x = 430

x = 430 - 347

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