NDA2018MathematicsPermutation and CombinationActual
How many four-digit numbers divisible by 10 can be formed using 1,5,0,6,7 without repetition of digits?
Options
- A24
- B3
- C44
- D64
Correct answer
A. 24
Step-by-step solution
A number divisible by 10 means the last digit is 0 . So, the remaining 3 digits can be arranged in 4 3 2 ways =24 ways.