Chemistry, asked by Abhipamuu, 10 months ago

The mean of 10 observations is 7. Themean of 15 numbers is 12 then the meanof all observations is ( )

1) 10
2) 11
3) 12
4) 9

Irrilative answers are reported

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Answers

Answered by ishuraj25122005

0

Answer:

hii

Explanation:

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