Find the value of n(A U B) if n(A) = 5, n(B) = 10 and n(A n B) = 4.
Added by Jasmine W.
Step 1
Second, we know that n(A n B) is the number of elements that A and B have in common. So, if we add the number of elements in A and the number of elements in B, we are counting the common elements twice. To get the correct total, we need to subtract the number Show more…
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