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Ranking Problems
## Formula
The number of ways to assign distinct ranks to $$r$$ people selected from $$n$$ people is:
$${}^nP_r$$
For ranking all $$n$$ distinct people:
$$n!$$
## Usage
- Used when positions or ranks are distinct and order matters.
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Ranking Problems
## Formula
The number of ways to assign distinct ranks to $$r$$ people selected from $$n$$ people is:
$${}^nP_r$$
For ranking all $$n$$ distinct people:
$$n!$$
## Usage
- Used when positions or ranks are distinct and order matters.
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