Aspire Faculty ID #15289 · Topic: JAMIA MCA 2016 · Just now
JAMIA MCA 2016

If $A = \{a, b, c\}$ and $B = \{a, b, d, e, f\}$ are two sets, then number of elements in $(A - B) \times (A \cap B)$ is …

Solution

$A - B = \{c\}$ (only $c$ not in $B$). $A \cap B = \{a, b\}$. Then $(A - B) \times (A \cap B) = \{(c, a), (c, b)\}$ → 2 elements.

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