Question

If A,B and C are three sets,each having a finite number of element,find the value of N(AuB)n (AuC) from the following information,N(AuBuC)=100,N(AnBnC)=10,N(AuBuC)=25,N(AnB)=N(BnC)=15,N(A)=N(C)=2(n(B)

Answer 1

well, you know that
n(AUB) = n(A) + n(B) - n(A∩B)
...

Answer 2

Answer

Answer 3

30