Question

8. How many 4-digit numbers can be formed by using the digits 3, 4, 9 and 0 without repeating
any digit?​

Answer 1

Explanation:

120 combination will be formed

Answer 2

About 100 120to

Explanation:

1) 3,0,4,9

2) 4,0,3,9

3) 9,0,4,3

4) 4,3,9,0

5) 3,4,0,9

6) 9,0,3,4

7) 3,9,4,0

8) 3,4,9,0