Same chapter3 marksDifficulty: Medium
If A has 3 elements and B has 4, how many relations and how many functions are there from A to B?
Relations and Functions
3 marksDifficulty: Medium
Distinguish between a relation and a function.
Original Khojo Papers practice question — not from a past board paper.
Answer
A relation from A to B is any subset of A × B. A function is a relation in which every element of A is related to exactly one element of B, so no element of the domain may have two images.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Every function is a relation, but not every relation is a function.
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