Math Problem Statement

ある試行の2つの事象A,Bについて、PA(B)=P(B)が成り立つとき事象Aは事象Bと独立であるという。このとき、PB(A)も成り立つことをしめせ。

Solution

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Math Problem Analysis

Mathematical Concepts

Probability Theory
Conditional Probability
Independence of Events

Formulas

Conditional Probability Formula: P(A|B) = P(A ∩ B) / P(B)

Theorems

Probability of Intersection for Independent Events: P(A ∩ B) = P(A) * P(B)

Suitable Grade Level

Advanced Mathematics