Hi Gurpinder

do not feel that u r asking a dumb q. all of us are here to learn from each other and lot of people in BTG patiently answer Q..

coming to ur Q, i do not have a facility to upload whatever i have sketch on my notepad. i refer the following link to clarify my doubt on venn diagrams for 3 sets(check for author "Bunuel")
https://gmatclub.com/forum/formulae-for- ... 69014.html

incase u have some Q, we can discuss


Thanks
Amar

Gurpinder,

Pls check this link for the venn diagram.

https://www.beatthegmat.com/difficult-ma ... -t728.html

Thanks Amar and Anand. I get it now. : )

WHen faced with a confusing Venn diagram I resort to the formula:

Total = Number in group 1 + number in group 2 + number in group 3 - number in both 1 and 2 - number in both 1 and 3 - number in both 2 and 3 - 2 times the number in all three + the number not in any group.


In this problem, you would find that (number in both 1 and 2 + number in both 1 and 3 + number in both 2 and 3) would give you the number favoring two products. That would have to be added to the number favoring all three to get the number favoring more than one. (Note: 15% represents the number liking none of the products.) You won't need to break out 1 and 2 versus 2 and t3, etc.