If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a2, b2, c2is -

If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a2

1.	If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a2, b2, c2is -
A.	2
B.	M2
C.	M2
D.	M2
Answer» C. M2

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If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a2, b2, c2is -

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