Q. 335.0( 3 Votes )

Mean of a certain A.

B.

C.

D.

Answer :

Given, mean is ,


Let x1, x2, …, xk are k observations.


And we know


The mean or average of observations, is the sum of the values of all the observations divided by the total number of observations.


i.e.


….[1]


Given, the terms are divided by m and increased by n. Then the terms will be



Let the new mean be x





Now, From [1] we have



Hence correct option is (A)

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