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Preface 3ÀÌ Ã¥ÀÇ Æ¯Â¡ 4TOPIC 1 Basic Counting Tools 91.1 One-to-one Correspondence 101.2 Principle of Inclusion and Exclusion 111.3 Addition or Multiplication 121.4 Casework or Complements 141.5 Circular Permutation 15 TOPIC 2 Distinguishables and Indistinguishables 472.1 Partition of Natural Numbers 482.2 Partition of Sets 492.3 Permutation allowing Repetition 502.4 Combination allowing Repetition 51TOPIC 3 Extending to Probability 713.1 Extending to Probability 723.2 Conditional Probability 763.3 Geometric Probability 77TOPIC 4 Special Themes 954.1 Recurrence Relation 964.2 Burnside's Lemma 974.3 Expected Value and Random Walk 99TOPIC 5 Mixed Practice 121