Question

In the first proof reading of a book containing 300 pages the following distribution of misprints was obtained:

No. of misprints per page (x):	0	1	2	3	4	5
No. of pages (f):	154	95	36	9	5	1

Find the average number of misprints per page.

Answer 1

Let the assume mean be.

We know that mean,

Now, we have .

Putting the values in above formula, we have

Hence, the mean number of students absent per day is 0.73.