If set A has 4 elements and set B has 2 elements, the number of onto functions from A to B is:
If set A has 4 elements and set B has 2 elements, the number of onto functions from A to B is:
- A. 14
- B. 16
- C. 12
- D. 8
Answer: A) 14
Explanation: Total functions from A to B is 2⁴ = 16. There are 2 functions that map all elements to exactly one element in B. Thus, onto functions = 16 − 2 = 14.
0 Answers
Log in to post your own answer or join the discussion.
No comments yet — start the discussion.