If $A = \{1, 2, 3, 4, 5\}$ and $B = \{2, 4\}$, then $B - A$ equals

If $A = \{1, 2, 3, 4, 5\}$ and $B = \{2, 4\}$, then $B - A$ equals
  1. $\emptyset$
  2. $\{2, 4\}$
  3. $\{1, 3, 5\}$
  4. $\{1, 2, 3, 4, 5\}$

Solution

All elements of $B$ are also in $A$, so $B - A = \emptyset$.

Asked in: MH-SSC-9

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