Question

Which one is true?
a)n(A unoin B)=n(A)+n(B)-n(A intersection B)
b)n(A-B)=n(A)+n(A intersection B)
c)n(A)= n(A-B)-n(A interection B)
d) None of these​

Answer 1

Answer:

I Think The Answer Will Be D

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Answer 2

The answer shall be D