Principles
Multiplication Principle
- If one event can occur in (m) ways and another in (n) ways, then the total number of ways both events can occur together = (m x n).
Addition Principle
- If one event can occur in (m) ways and another in (n) ways, then the number of ways in which either of the two events can occur = (m + n).
- Applicable for more than two events as well.
Multiplication vs. Addition Principle
- In multiplication, the word “and” is used.
- In addition, the word “or” is used.
- In multiplication, the event is yet to be completed.
- In addition, the event is completed, and there is another way to do the same event.
Permutation
- Definition: The arrangement of some or all objects from a given set of objects is known as a permutation.
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