**We started a new unit called**

__Well Today...____Probability__.

I'm sure you all know the basic idea behind the word probability, but I'm going to write down a few definitions that we learned today.

**A measure of the likely hood of an occurrence of an event.**

__* Probability:__**A list of all possible outcomes.**

__* Sample Space:__**A particular outcome within the**

__* Event:__**sample space**.

**A result of an experimental probability trial that is carried out in one step.**

__* Simple Event:__**A Result of an experimental probability trial that is carried out in**

__* Compound Event:____more__than one step.

**an event that has a probability of 1 or 100%**

__* Certain events:__**As you can guess, it is an event which has a Probability of 0 or 0%.**

__* Impossible Events:__**: Probability is shown in between 1 and 0. But also remember that probability can be relayed as a decimal, percent or fraction.**

__IMPORTANT__If you glance through the slides posted up earlier today, you will see the kinds of things we where looking at. The slides also explain the difference between the two different types of probability:

__which is the likely hood that an event, or desired outcome, will occur.__

**Theoretical Probability**__, on the other hand is probability defined by__

**Experimental probability****DOING**something.

An example of that is within the slides that depict what we did today in class. We actually tossed a set of 3 coins 20 times to determine the probability of getting a head to tail ratio of 0:3,1:2,2:1 and 3:0. Because we actually

**DID**the experiment, it makes it experimental probability.

The formulas for finding the two types of probability above are within the slides.

That is about all I have to say about the days events.

__DON'T FORGET ABOUT THE TEST ON FRIDAY EVERYONE!!!__The Next Scribe Will Be

**... hope your Internet is up and running again :P**

*Chelsea*
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