In the first proof reading of a book containing 300 pages the following distribution of misprints was obtained:
Find the average number of misprints per page.
No. of misprints
per pages (x): 0 1 2 3 4 5
No. of pages (f): 154 95 36 9 5 1
Answers
Average no. of misprints per page is 0.73
solution:
•No. of misprints
per pages (x): 0 1 2 3 4 5
•No. of pages (f): 154 95 36 9 5 1
• Now we will find corresponding FiXi which are 0 95 72 27 20 5
• Now find sum of FiXi i.e. 219
• also sum of Fi is 300 i.e. no. of pages
•Now, average no. of misprints(mean) is given as
(sum of FiXi)/(sum of Fi)
mean = 219/300
=0.73
0.73 is average number of misprints per page
Step-by-step explanation:
No. of misprints per pages Number of Pages misprints
0 154 0
1 95 95
2 36 72
3 9 27
4 5 20
5 1 5
300 219
average number of misprints per page. = total Misprint / total pages
= 219/300
= 0.73
0.73 is average number of misprints per page
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