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Discrete Mathematics
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Fundamental principle of counting
Fundamental Principle Of Counting
6.1 The Basics of Counting
We Well Present Some Of Basic Counting Principles:
-The Product Rule- The Sum Rule- The Subtraction Rule- The Division Rule
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The Product Rule
Product rule
Generalized product rule:
If we have a procedure consisting of sequential tasks T1, T2, …, Tm that can be done in n1, n2, …, nm ways, respectively, then there are n1 n2 … nm ways to carry out the procedure.
The Sum Rule
The Subtraction Rule
kK + 1
Example : In our 60-student class, at least 12 students will get the same letter grade (A, B, C, D, or F).
The End
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