Thursday, March 6, 2014

9.7: Probability

In this lesson, we explored how to  calculate the probability of different situations.

Important Vocabulary
Independent events: the occurrence of one event has no effect on the occurrence of one event has no effect on the occurrence of the second event. Keyword: with replacement.
Complement of an event: the probability that the event will not happen.

Mutually exclusive events
Two events A and B are mutually exclusive if A and B have no outcomes in common. The keyword is or. 

To find the probability that one or the other of two mutually exclusive events will occur, add the probabilities.

Independent Events
To find the probability that two independent events will occur, multiply the probabilities.

Complement of an Event
If the probability of  A is P(A), the probability of the complement is 1-P(A).

Q: How does a mathematician induce good behavior in her children? 
A: `I've told you n times, I've told you n+1 times...' 

source: http://www.jokes4us.com/miscellaneousjokes/mathjokes/


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