NDA 2018
- Exam
- NDA
- Year
- 2018
- Subject
- Mathematics
- Chapter
- Permutation and Combination
NDA 2018 · Mathematics · Permutation and Combination
How many four-digit numbers divisible by 10 can be formed using...
How many four-digit numbers divisible by 10 can be formed using without repetition of digits?
Options
- A
- B
- C44
- D64
Correct answer
A.
Step-by-step solution
A number divisible by 10 means the last digit is 0. So, the remaining 3 digits can be arranged in ways ways.