What’s the Probability of:
(Write as fractions)
These are all theoretical probabilities
Flipping a coin and landing heads:
P(Heads) = __________
Rolling a 1 from a die:
P(1) = __________
Pulling a King from a deck of cards:
P(King) = _________
Class Coin Experimental Probability:
Coin Toss:
Die Roll:
http://my.hrw.com/math06_07/nsmedia/video_tutor/na_alg1.html
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Another Example:
A department store is offering a discount on sunglasses.
The table shows the number fo each type of
discounted sunglasses.
You chose a pair at random.
What is the probability that the pair you hose is
polarized?
Green Lens
Brown Lens
Polarized
8
4
Mirrored
7
9
Other questions we could ask and create new events????????
1.
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2._______________________________________________________________________________
3.
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4.
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Determining sample spaces for probabilities
–
Use a Tree Diagram
Example:
Use a Tree Diagram to determine the number of outfits you could wear..
Your mom thought it
would be nice to buy you some new clothes for the summer.
She bought you
3 tshirts:
red, blue, green and
two pair of shorts:
black and tan.
All the shirts can be worn with the pants.
How many outfits do you have?
Let’s add another pair of shorts (gr
ay) and a shirt (yellow)
–
How many outfits do you have?
What’s the probability in both situations that you will at random grab a red t
shirt and black shorts.
Resources for more:
http://www.youtube.com/watch?v=mkDzmI7YOx0
Algebra 1 Survey Book Pg 843
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 Fall '12
 Friedrich
 Algebra, Conditional Probability, Experimental Probability, Probability, Probability theory, Coin flipping, Mathematics in medieval Islam

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