Question

If the mean of the following distribution is 27, find the value of p.

Class:	0−10	10−20	20−30	30−40	40−50
Frequency:	8	p	12	13	10

Answer 1

Given: Mean = 27

Let the assumed mean A = 25 and h = 10.

We know that mean,

Now, we have,,

Putting the values in the above formula, we have

Thus, the value of p is 7.