A book has 120 pages and has a mean of 231 words per page, if the first 20 pages have a mean of 236 words per page, what is the mean of words per page for the remaining 100 pages?

  • 0 votes

I got 231, but apparently that's wrong. The answer is 230, but how do you get there?

Posted Sat 9th June, 2012 @ 12:13 by Hoosierette

3 Answers

  • 2 votes

Approximate total no of words for 120 pages at a mean of 231 gives (120*231) = 27720

Approximate total no of words for the first 20 pages at a mean of 236 gives (20*236) = 4720

Possible amount of remaining words in the remaining 100 pages are (27720-4720) = 23000

Therefore the mean of words per page for the remaining 100 pages is (23000/100) = 230

Answered Sat 9th June, 2012 @ 12:24 by Ahamed
  • 1 vote

Not really small mistakes are usual.

and you're welcome

Answered Sat 9th June, 2012 @ 12:33 by Ahamed
  • 0 votes

Thanks, wow I'm dumb!

Answered Sat 9th June, 2012 @ 12:31 by Hoosierette