What in the world are Foreign events?
about the first Question is known that A and B are Foreign events.
and i asked to find P(A).
about the second Question is known that A and B are event and i asked to decide what value y cannot get.
i tried with the De Morgan laws but i am not sure if i correct in my way.
Draw a Karnaugh Table:
It is simple to solve for x and hence get Pr(A).
As I said earlier, unless you say what sort of events A and B are, this question cannot be answered. But I suggest you draw a Karnaugh Table and make an attempt at it before posting your clarification. Then you can say what you've done and where you get stuck.