prove that : n(A - B) = n(A) - n(A n B)
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hey mate here is your answer
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1
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See below.
Step-by-step explanation:
I think this could be easy with the help of Venn diagrams. I have attached with the answer. Basically the set A - B is set A with A intersection B removed.
So, from A subtract A intersection B, the same idea applies to the number of elements in each of the sets.
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