SOLUTION: Let A and B be subsets of U n(U)=52 n(A)=25 n(B')=17 n(A U B)=41 Find n(B)? It don't know where to start it

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Question 397593: Let A and B be subsets of U
n(U)=52
n(A)=25
n(B')=17
n(A U B)=41
Find n(B)?
It don't know where to start it
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
n(B) = n(U \ B') = n(U) - n(B') = 52 - 17 = 35.