Q. 154.8( 5 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 = 12 + p & Σfixi = 270 + 25p


mean is given by




288 + 24p = 270 + 25p


25p – 24p = 288 – 270


p = 18


Thus, p is 18

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