1.

If the mean of the observation : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of last three observation is (a) 313(b) 323(c) 343(d) 353

Answer» If the mean of the observation : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of last three observation is



(a) 313(b) 323(c) 343(d) 353


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