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Mathematics, 02.12.2021 04:00 megharx

The mean of 7 numbers is 15. When an 8 thnumber is added, the mean decreases to 12. What is the 8 thnumber?.

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The mean of 7 numbers is 15. When an 8 thnumber is added, the mean decreases to 12. What is the 8 th...

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