Let A and B be sets with |A| = 3, |B| = 2. The number of onto functions from A to B is: A. 6 B. 8 C. 9 D. 4 Answer: A) 6 Explanation: Total functions = 2³ = 8. Subtract functions that miss one element: 2 × 1³ = 2. So onto functions = 8 − 2 = 6.

imo class 12 relations and functions

Let A and B be sets with |A| = 3, |B| = 2. The number of onto functions from A to B is:

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Let A and B be sets with |A| = 3, |B| = 2. The number of onto functions from A to B is:

Answer: A) 6

Explanation: Total functions = 2³ = 8. Subtract functions that miss one element: 2 × 1³ = 2. So onto functions = 8 − 2 = 6.