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.
-$n ( A \cap B ) = n ( A ) - n ( B )$

Question

Quizplus · Accepted Answer

The formula $n(A \cap B) = n(A) - n(B)$ is incorrect. The correct formula to find the intersection of two sets does not involve subtracting the cardinality of one set from the other. Instead, the intersection of two sets involves elements that are common to both sets, and its cardinality cannot be determined solely by knowing $n(A)$ and $n(B)$.

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

Let a and B Be Sets with Cardinal Numbers, N(A)= $n ( A \cap B ) = n ( A ) - n ( B )$