So the question is -
If 3/4 of all the cookies have nuts and 1/3 of all the cookies have both nuts and fruit, what fraction of all the
cookies have nuts but no fruit?
3/4 of all the cookies have nuts?
So, 3/4 of all the cookies have only? nuts (but no fruit or might have fruit?)
1/4 of them have both nuts and fruits (this is clear)
So if we have 60 cookies
3/4 of them i.e, 45 have nuts (only nuts?)
1/3 of them i.e, 20 have both nuts and fruits
I searched for this problem in gmatclub forum, deduction for cookies with only nuts and no fruits
is to subtract 45 - 20 (I didn’t get this part)