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overlapping sets

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overlapping sets

by gmatstud25 » Sat Sep 27, 2008 1:35 pm
Can someone post formulas for the number of things in 3 overlapping sets:

1.total number of objects: aubuc
2.In exactly 1 set
3. in exactly 2 sets
4.in atleast 1 set
5.in atleast 3 sets

Help much appreciated
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by stop@800 » Sun Sep 28, 2008 5:55 am
total - neither = A + B + C - (Things in two sets) - 2 * (things in all 3 sets)

A: Things in set A [complete]
Things in two sets: Will be three values [things in AB, BC, CA]

With this you can crack each and every question....

Hope it helps!!
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