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The arithmetic mean of 4 numbers is 15. ...

The arithmetic mean of 4 numbers is 15. The arithmetic mean of another 6 numbers is 12. What is the arthmetic mean of the combined 10 numbers?

A

12.2

B

12.8

C

13.2

D

13.8

Text Solution

Verified by Experts

The correct Answer is:
C
Arithmetic mean of
`"10 numbers "=(4xx15+6xx12)/(10)=(60+72)/(10)=13.2`
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