Question

there will be no one - one function from a to b when n(a) = 4, n(b)= 3​

Answer 1

Answer:

Correct option is

C

120

n(A)=4 and n(B)=5

For one-one mapping

4 elements can be selected out of 5 elements of set B in

5

C

4

ways

and then those 4 selected elements can be mapped with 4 elements of set A in 4! ways.

Number of one-one mapping from A to B =

5

C

4

×4!=

5

P

4

=

(5−4)!

5!

=5!=120

Answer 2

Answer:

1

Step-by-step explanation:

=(a)4-(b)3

=4-3

=1

so,answer is 1

I hope my answer will help you