9-2 Probability!

Hey guys! So this section is all about probability.



Here are the terms and definitions:



Random Experiment: The act of doing something

Trial: Each time you do something

Simple Event/Outcome: What you get

Sample Space: All the possible outcomes

Probability of an Event: number of ways it can occur / number of possible outcomes

OR: P(E)=n(E)/n(S)



Now try it out:



You have 16 individual socks in a drawer and 9 of them are white and 7 of them are black. If you draw one at random, what is the probability that you will draw a white sock? What is the probability that you will draw a second white sock?



Since there are 16 total and 9 of them are white, you have a 9 in 16 chance of drawing a white sock, so you have a probability of 9/16.

Now there are only 15 socks in the drawer, 8 of which are white and 7 are black. You have a 8/15 chance of drawing a white sock this time.



For more information try:

http://www.k111.k12.il.us/king/math.htm#Probability

and

www.mathgoodies.com/lessons/vol6/intro_probability.html



Ellen you are next