Let $A$ and $B$ be subsets of a set $X$. Then
Let $A$ and $B$ be subsets of a set $X$. Then
- A
$A - B = A \cup B$
- B
$A - B = A \cap B$
- C
$A - B = {A^c} \cap B$
- D
$A - B = A \cap {B^c}$
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$A-C$
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- [IIT 2011]
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If $X$ and $Y$ are two sets such that $X \cup Y$ has $50$ elements, $X$ has $28$ elements and $Y$ has $32$ elements, how many elements does $X$ $\cap$ $Y$ have?
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