perplexus.info :: Just Math : Pick-a-book meeting

Pick-a-book meeting (Posted on 2018-02-12)

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?

See The Solution Submitted by Ady TZIDON

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Subject	Author	Date
re(3): I agree ======i do not agree with you	Ady TZIDON	2018-02-14 08:52:13
re(2): I agree ======i do not agree with you	broll	2018-02-13 10:33:13
re: I agree ======i do not agree with you	Ady TZIDON	2018-02-13 06:49:22
I agree	broll	2018-02-12 22:04:32
Solution	Jer	2018-02-12 09:20:12

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