1.

The mean of a data is 15 and the sum of the observations is 195. The number of observations is(a) 13 (b) 19 (c) 16 (d) 17

Answer» The mean of a data is 15 and the sum of the observations is 195. The number of observations is



(a) 13 (b) 19 (c) 16 (d) 17


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