The first section of this chapter gives an overview of fundamental principles of counting along with a presentation of various practical situations and examples. The second section of this chapter deals with permutations which includes permutations as arrangements. This is followed by a set of examples. Finally, at the end of this chapter, the last section guides us through the combinations which includes the detailed explanation of “combinations as selections” followed by a series of intriguing examples.

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Fundamental Principle of Counting



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Combinatorics - Answers Set 1
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Combinatorics - Questions Set 2
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Combinatorics - Answers Set 2
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