Easy Practice — Set 2

Quick Recap — Probability Basics

• $0\le P(A)\le1$; $P(\text{sure})=1$, $P(\text{impossible})=0$, $P(A')=1-P(A)$.
• Addition: $P(A\cup B)=P(A)+P(B)-P(A\cap B)$; mutually exclusive $\Rightarrow P(A\cap B)=0$.
• Independent: $P(A\cap B)=P(A)P(B)$.
• Sample-space sizes: coin $2$, die $6$, two dice $36$, deck $52$.