Question

If n(A union B)=x+n(A Delta B) then x=???

Answer 1

Answer:

Given;

n(AUB) = x + n(A∆B)

To find; x=?

Solution;

=> n(AUB) = x + n(A∆B)

=> n(AUB) = x + n(AUB) - n(AnB)

{ n(A∆B) = n(AUB) - n(AnB)}

=> x = n(AnB)