Question

Set A has 3 elements and set B has 4 elements. The number of injections that can be defined from to is

Solution

Correct option is

24

A has 3 elements and B has 4 elements for injective mapping first elements of can go to any of 4 of B,  2nd to 3 of  B and 3rd to 2 of B.

In short P3.

SIMILAR QUESTIONS

Q1

 

 

Q2

Is equal to

Q3

Which of the following functions have inverse defined on the ranges:

Q4

 be to functions given by 

Q6

Given 

Q8

For real x, let (x) = x3 + 5x +1, then

Q9

 

 

Q10

The number of surjections from A = {1, 2,...n},onto = {a, b} is