September 20, 2010

Bell Ringer

1: If the probability of an Event E is 40%, what is the probability of not E? (E')

2: If the same event E takes place 3 times, what is the probability of the result being

E E' E' ??

1. Probability of E is 40% = 4/10 ....which leaves the probability of E' to be 6/10.

6+4= 10

2. k so its really hard to do a tree diagram, but that would be the best step so, time to go to plan B which iiissss...just explaining it.... ok so

• first we have to calculate the probability of E which is 4/10
• then, we know that the probability of E' is 6/10
• again, we know that the probability of E' is 6/10
• So now we can MULTIPLYYYYY

4/10 * 6/10 * 6/10 = 8/125

So the answer for the probability of E E' E' is 18/125

Agenda

I. Bell Ringer

II. Theoretical vs. Experimental Probability

III. Independent Events (in other words... h.w..we got tricked! =] )

Homework!!

pg. 490 #1-5

OBJECTIVE

Students will be able to differentiate the difference between experimental and theoretical Probability.

Question of the day....drum roll please!!!!

1.The probability that Blazer will spend the day with a Princess is 80%. What is the probability that Blazer won't spend the day with the Princess?

2. Over three days, what is the probability that Blazer will spend the first two days with the princess and not on the third day? (P P P' )