Brain Teasers
Some Old Books
The local library decided to hand out some of its old books to its 1400 borrowers. To each of the female borrowers they gave 6 books and to each male borrower they gave 4 books. If only half of the females in town and three quarters of the males in town accepted the books how many books were given away?
Hint
Choose a random number of girls and then work it out.Answer
4200 books.Since each female was offered 6 books but only half of them accepted, on an average, each of them got 3 books. Also, since each male was offered 4 books and three quarters accepted, again an average male got 3 books. Since females and males got the same number of books per person, it doesn't matter how many females there actually are.
So, total books given away = 1400 x 3 = 4200.
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© Kevin Stone: www.brainbashers.com
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