Don't know how to do these questions. Understand how to use Venn diagrams but to many terms for my mind. Can anybody tell me how to figure this out?
Since $\displaystyle P(A \mbox{ and }B)=P(A)P(B)$ where $\displaystyle A,B$ are disjoint.Originally Posted by Arbitur
Thus, the answer to the first question is $\displaystyle (.2)(.3)=.06$.
Since $\displaystyle P(A\mbox{ or }B)=P(A)+P(B)$ where $\displaystyle A,B$ are disjoint.
Thus, the answer to the second question is $\displaystyle (.2)+(.3)=(.5)$.
Since $\displaystyle P(A)+P(B)+P(C)=1$ where $\displaystyle A,B,C$ are disjoint.
Thus, the answer to the third question is $\displaystyle 1-.5=.5$.
Q.E.D.