Let a, b, c be the three observations. The mean of these observations is. (a) a+b+c2 (b) a×b×c2 (c) a+b+c3 (d)



Let a, b, c be the three observations. The mean of these observations is.
(a) a+b+c2 (b) a×b×c2 (c) a+b+c3 (d) a+bc




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