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?

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- Feb 20th 2006, 10:55 AMArbiturhelp-probability
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?

- Feb 20th 2006, 11:08 AMThePerfectHackerQuote:

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.