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The mean of Hayley’s marks on 5 tests is 77.5%. The marks on the first 4 tests were 88%, 76%, 68%, and 72%, but she lost the fifth test. Find the mark on the fifth test. Show your work.
4 years ago

Answers

oobleck
88+76+68+72 + x = 5*77.5
x = 83.5

Hmmm. I suspect a typo
4 years ago

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