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

RollRoll asked Apr 24, 2022

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RollRoll asked Apr 24, 2022

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18 votes

Answer:

-9?????????????????????????

Explanation:

Hucuhy answered Apr 29, 2022

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