At an election, a voter may vote for any number of candidates, not greater than the number to be elected. There are 10 candidates and 4 are to be elected. If a voter votes for at least one candidate, then the number of ways in which he can vote is
5040
6210
385
1110
As we learnt in
Number of Permutations with repetition -
The number of ways of filling r places where each place can be filled by any one of n objects.
It is
- wherein
Where
Correct option is 1.
Option 1)
5040
This is the correct option.
Option 2)
6210
This is an incorrect option.
Option 3)
385
This is an incorrect option.
Option 4)
1110
This is an incorrect option.
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