CUET · MATHS · PYQ PAPER 2023
If set A has 5 elements and set B has 7 elements then number of one-one and onto mapping from A to B is:
- A 2
- B \(0\)
- C 1
- D 3
Answer & Solution
Correct Answer
(B) \(0\)
Step-by-step Solution
Detailed explanation
For a one-one and onto mapping from A to B to exist, \(|A|\) must be equal to \(|B|\). Given \(|A| = 5\) and \(|B| = 7\), since \(|A| \neq |B|\), the number of one-one and onto mappings from A to B is \(0\).
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