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Jacob has a mean score of 78 after his first four math tests. He wants to make a B, or an average of 80, in math. What does he need to score on the fifth test to have a mean score of 80?
14 years ago

Answers

Ms. Sue
80 * 5 = 400

78 * 4 = 312

400 - 312 = 88

14 years ago

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