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Asked by Samuel

The mean cost of of books is 3, the total cost of 4 was 11. What is the cost of 5th book?
6 years ago

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Answered by oobleck
11 + x = 5*3
6 years ago
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The mean cost of of books is 3, the total cost of 4 was 11. What is the cost of 5th book?

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