Asked by Tabitha
Let A and B be subsets of a universal set U and suppose n(U) = 390, n(A) = 130, n(B) = 90, and n(A B) = 40. Find the number of elements in the set.
n(Ac n Bc)
n(Ac n Bc)
Answers
Answered by
oobleck
390-(130+90-40) = ____
Ac ∩ Bc = (A U B)c
in other words, everything in U which is not in A or B or both.
Ac ∩ Bc = (A U B)c
in other words, everything in U which is not in A or B or both.
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