The mean of 10 numbers is 7. The mean of 15 numbers is 12 then the mean of all observations is ………… A) 9

The mean of 10 numbers is 7. The mean of 15 numbers is 12 then the mean of all observations is …………

A) 9

B) 10

C) 12

D) 11

Monjur Alahi

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2025-01-04 04:42

0 Answers

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