IBM
Company
Numerical Ability
Permutation and Combination
How many ways can 10 letters be posted in 5 post boxes, if each of the post boxes can take more than 10 letters?
Read Solution (Total 3)
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- 1t letter can be posted by 5 ways
simlarly second can be posted by 5 ways
..
.... so 5^10 - 11 years agoHelpfull: Yes(3) No(2)
- Ans: 50
10 letter can be submitted in 10 ways in 1st post box + 10 letters in second post box + ......
- 10 years agoHelpfull: Yes(0) No(1)
- Each of the 10 letters can be posted in any of the 5 boxes.
So, the first letter has 5 options, so does the second letter and so on and so forth for all of the 10 letters.
i.e.5×5×5×….×55×5×5×….×5 (up-to 10 times)
=510 - 8 years agoHelpfull: Yes(0) No(1)
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