- #1
cr7einstein
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Homework Statement
If I am given ##n(A)## and ##n(B)## for two sets A and B, and also provided with ##n(A\cap B)^2##. We are supposed to find ##n((AXB) \cap (BXA))##.
Homework Equations
My teacher said that the formula for ##n((AXB) \cap (BXA)) = n(A \cap B)^2##. I am not sure how do you get to this result.
The Attempt at a Solution
So my question is, how do you prove (or derive the relation)-
##n((AXB) \cap (BXA)) = n(A \cap B)^2##
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