Thursday, September 16, 2010

Thursday, September 16, 2010

Today in class we learned about probability. Probability is the likelihood of a possible outcome.
Probability can be mathematically shown as
P= # of favorable outcomes over # of possible outcomes.
In an equation, you would show probability as P(event). Event meaning the event you are trying to solve. For example, If you were trying to find the probability of rolling an odd number with a dice, you would write P(odd)= 1/2
A good way to solving probability problem is to use a table. For example, if you had 2 dice what is the probability that the dice you rolled would add up to 7?
P(sum of 7)

. . 1  2  3  4  5 . 6
1  2  3  4  5  6 . 7
2  3  4  5  6  7 . 8
3  4  5  6  7  8 . 9
4  5  6  8  9  10
5  6  7  8  9 10 11
7  8  9  10 11 12

By using the table you can easily see that there are 6 possibilities of rolling the number seven.

That is your lesson today on probability, sorry for the late post. I had extreme trouble with the website.
-Oran L.

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