확률 및 랜덤
Chapter 1. Experiments, Models, and Probabilities
Chapter 2. Discrete Random variables
Chap4. Pairs of Random Variables
1.1 Set Theory
※ Mathematical basis of probability : the theory of sets
◈ Set : a collection of things (denoted by A, B, C)
◈ Elements : the things that make up the set (denoted by x, y, z)
▶ Ways to define a set
▶ Inclusion (∈) : a relationship between an element and a set
- x ∈ A : x is an element of set A.
- x ∉ A : x is not an element of set A.
▶ Subset (⊂) : a relationship between two sets
- A ⊂ B: The set A is the subset of set B.
▶ Set equality (=)
A = B : if and only if A ⊂ B and B ⊂ A
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