TCS
Company
Numerical Ability
Permutation and Combination
How many 3 digits with 3 Distinct digits are there from 100-1000.
Read Solution (Total 4)
-
- 9*9*8 = 648 numbers
- 12 years agoHelpfull: Yes(12) No(3)
- BY using the Fundamental Counting Principle.
For the hundreds column, you only have a choice of 9 numbers (i.e. Digits 1 through 9.
The next column can have any of the remaining 9 digits from 0 through 9 that were not already chosen.
Since 2 of the digits were already used, the third spot can have any of the remaining 8 unused digits.
So No.of Distinct Digits are 9 x 9 x 8 = 648
- 12 years agoHelpfull: Yes(7) No(1)
- 9*9*8=648 is the answer
- 9 years agoHelpfull: Yes(1) No(1)
- 9*9*8 = 648
- 9 years agoHelpfull: Yes(1) No(1)
TCS Other Question