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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 4 · Set 1 · Q9
If f: N → W is defined as f ( n )= {n/2, if n is even; 0, if n is odd}, then f is:
If $\displaystyle \mathrm{f}: N \rightarrow W$ is defined as \[\mathrm{f}(\mathrm{n})=\left\{\begin{array}{ll} \frac{\mathrm{n}}{2}, & \text { if } \mathrm{n} \text { is even } \\ 0, & \text { if } \mathrm{n} \text { is odd } \end{array},\right. \] then f is :
Official answer
(B)
surjective only
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CBSE Class 12 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.