At a meeting of the Young Historical Society (YHS) in a local library the number of children present was three times the number of parents.
At this meeting, each boy borrowed 12 books from the library, each girl borrowed 17 books and each parent borrowed 9 books.
In total 305 books were borrowed.

How many girls were there at the YHS meeting?

(In reply to re: I agree ======i do not agree with you by Ady TZIDON)

15=12+9/3.

20= 17+9/3

because each child is accompanied by a third of a parent, and each parent takes 9 books. Too obvious to require spelling out, I thought, but it seems I was wrong.

Why not try solving my version of the puzzle?

Edited on February 13, 2018, 10:34 am

Posted by broll on 2018-02-13 10:33:13