Question

If A = {1, 2,3} , B = { 1, 2, 3, 4} , then find the no of possible one-one
functions from A to B ​

Answer 1

Step-by-step explanation:

A={1,2,3,4} and B={a,b,c}

Let number of elements of A be r and number of elements of B be m.

⇒ Number of elements of set A=r=4

⇒ Number of elements of set B=n=3

Here, we can see r>n.

One-one function is only possible from A to B if number of elements in B is greater than number of elements in A.

∴ The total number of one-one function from A to B is 0.

hope it will help u ✌️✌️

Answer 2

Answer:

the possible one - one functions from A to B are 3