Question

If n(X)=200,x)=300 and n(XUY)=400
then
Find the value of n(XnY)

Answer 1

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Answer 2

Here,
n(X)=200
n(Y)=300
n(XuY)=400
n(XnY)=?
Now,
n(XnY)=n(X)+n(Y)-n(XuY)
=200+300-400
=500-400
=100
n(XnY)=100