Using numbers from 0 to 9 the number of 5 digit telephone numbers that can be formed is
Answer & Explanation
The numbers 0,1,2,3,4,5,6,7,8,9 are 10 in number while preparing telephone numbers any number can be used any number of times.
This can be done in ways, but '0' is there
So, the numbers starting with '0' are to be excluded which one in number.
Total 5 digit telephone numbers = = 3439
Permutations and Combinations
- Quantitative Aptitude - Arithmetic Ability