There are 3 approaches to tackle 2 overlapping sets problems:
1. Double-set matrix.
2. Venn diagram.
3. Formulas (as in this question).
Which one to choose depends on the problem and your personal preferences.[/quote]
Thank you for pointing that out. I agree that they fit different questions indeed and I have used all of them.
Now strictly for Double-Set matrix problems in DS
Is it the normal practice to draw three matrixes, one for the initial information given, one adding the info on Statement 1
And then a third one only adding info on Statement 2 (which you can then use if 1 and 2 are needed) ?
I find it a bit time consuming but proves to be safer, just wondering if you and other people around here do it this way
Cheers
J