Hi, can anyone please help me with this question? Thanks a lot.
Let A, B, and C be any three events. Show that:
(1) if and only if
(2) Given and , determine
For first part, I don't know how to start at all. Plus, with "if and only if", does that mean I need to prove from two directions?
For second part, I did draw Venn Diagram, but still don't feel that is very helpful, except I did find , am I right? What should I do?
Thanks a lot.