Q. 134.6( 7 Votes )

If the mean of th

Answer :

For equal class intervals, we will solve by finding mid points of these classes using direct method.

We have got


Σfi = 39 + p and Σfixi = 2370 + 30p


mean is given by



( given: mean of pocket allowance is 54)


2106 + 54p = 2370 + 30p


54p – 30p = 2370 – 2106


24p = 264


p = 11


Thus, p is 11.

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