SOLUTION: If n(A) = 14, n(A union B) = 17, and n(B) = 9, then what is n(A ∩ B)?

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Question 735789: If
n(A) = 14, n(A union B) = 17, and n(B) = 9,
then what is
n(A ∩ B)?

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

n%28A%29+=+14, n%28A+U+B%29+=+17, and n%28B%29+=+9,
then
n(A ∩ B)=%28n%28A%29%2Bn%28B%29%29-n%28A+U+B%29=+%2814%2B9%29-17=23-17=6