Mathematics
Mathematics, 28.07.2021 17:10, bri9263

A group of 12 boys has a mean age of 10.75 years. One of them, aged 13.5, leaves the group. What is the mean age of the remaining boys?​

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A group of 12 boys has a mean age of 10.75 years. One of them, aged 13.5, leaves the group. What is...

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