Q. 344.2( 8 Votes )

If , then =
A. 23

B. 24

C. 27

D. 25

Answer :

We have given,


Putting this in above equation

Now, given …[1]

using this

We have,


We know,

If x1, x2, … , xn are observations with frequencies f1, f2, … , fn i.e. x1 occurs f1 times and x2 occurs f2 times and so on, then mean() of observations is given by

From [1] and [2]

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