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Previous Year Question (PYQs)

If the set A contains 5 elements and the set B contains 6 elements, then the number of one-one and onto mappings from A to B is:




Solution

For a one-one onto (bijective) mapping, the two sets must have the **same number of elements**. Here, $|A| = 5$, $|B| = 6$. Since $5 \ne 6$, no bijection exists. $\boxed{\text{Answer: (C) 0}}$

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