My homework is all online, and these three damn questions are just not working for me. I've tried inputting several different answers in several different ways and I can not figure out what I'm doing wrong. Help?
n[(A intersection Bc) U (Ac intersection B)]
Separate problems unrelated to the image:
Let A and B be subsets of a universal set U and suppose n(U) = 200, n(A) = 100, n(B) = 80, and n(A intersection B) = 40. Compute:
1. n(A U B)
2. n(A intersection Bc)
[the tiny c's are supposed to be superscript]