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Let a and B Be Sets with Cardinal Numbers, N(A)= n(A∪B)=n(A)+n(B)−n(A∩B)n ( A \cup B ) = n ( A ) + n ( B ) - n ( A \cap B )

Question 142

True/False

Let A and B be sets with cardinal numbers, n(A)= a and n(B)= b, respectively. Decide whether the statement is true or false.
- n(A∪B)=n(A)+n(B)−n(A∩B)n ( A \cup B ) = n ( A ) + n ( B ) - n ( A \cap B )

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