1.1.4.2 Permutation and Combination
1 year ago
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Principles of Counting
Principle of Multiplication
Principle of Addition
statistics
Factorial
Counting
Permutation
Combination
In this video, you will get the idea of Permutation and Combination.
Permutations: Unique arrangements of items
1 of 2. Linear Permutation
Number of unique possible ways a set of items can be arranged in a line taken some or all at a time.
2 of 2. Circular Permutation
Clockwise and anti-clockwise direction produce DIFFERENT arrangements: (n-1)! permutations
Clockwise and anti-clockwise direction produce SAME arrangements: (n-1)!/2 permutations.
Combination: Grouping of items (Position has no effect in counting) taken some or all at a time
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