The average number of printing error per page in a book of 512 pages is 4. If the total number of printing error in the first 302 pages is 1,208, the average number of printing errors per page in the remaining pages is	Choose the correct choice from the following answers
A) 0  B) 4  C) 840  D) 90  E) None of the above
Remaining pages = 512 – 302 = 210   Let average printing error in remaining pages = x   Then, 1208+210×x/512=4   ⇒ 210x = 840 ⇒ x = 4   Answer 4
<result>B</result>
The average number of printing error per page in a book of 512 pages is 4. If the total number of printing error in the first 302 pages is 1,208, the average number of printing errors per page in the remaining pages is