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If the average of a,b,c is M and ab+bc+c...

If the average of a,b,c is M and `ab+bc+ca=0`, then the average of `a^2,b^2,c^2` is

A

`M^2`

B

`3M^2`

C

`6M^2`

D

`9M^2`

Text Solution

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The correct Answer is:
B
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