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- bob bundy
- 2012-10-13 03:20:08
hi juan
Welcome to the forum.
Have a look at this thread:
http://www.mathisfunforum.com/viewtopic.php?id=18146
I have shown there how you can do these 3 set problems.
Bob
ps. I'm a bit worried about these children as there seem to be half children in some sets. 
- juan
- 2012-10-13 00:40:26
65% of children in a sport club play football, 70% play volley-ball and 75% play basket ball. What is
the minimum number of children playing all the three games, if the total number of children in the
sport club is 90