In a group of students, 50 speak English, 50 speak French and 50 speak Spanish. Some students speak more than one language. Prove it is possible to divide the students into 5 groups (not necessarily equal), so that in each group 10 speak English, 10 speak French and 10 speak Spanish.

(In reply to re: Solution (yes, too informal) by Tristan)

Tristan, I'm not sure I see how that is a counter example - you made a new problem statement.  So how is that a counter example to my "solution" to the original problem statement?

Posted by nikki on 2004-11-11 08:21:51