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- Solve this problem In how many differnt ways can 3 different rings be worn in 5 fingers of a hand?
In how many differnt ways can 3 different rings be worn in 5 fingers of a hand?
- Option 1)
3! x 5!
- Option 2)
35
- Option 3)
210
- Option 4)
180
Answers (1)
P
Prateek Shrivastava
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As learnt in
Number of Permutations without repetition -
Arrange n objects taken r at a time equivalent to filling r places from n things.
- wherein
Where
First ring can be worn in 7 ways
Second in 6 ways
Third in 5 ways
Option 1)
3! x 5!
This option is incorrect.
Option 2)
35
This option is incorrect.
Option 3)
210
This option is correct.
Option 4)
180
This option is incorrect.