1. Lesson 7 (4 th 6 Weeks) TEKS 6.9B

2. How likely it is that a particular outcome will occur A number from 0 through 1 Can be written as a fraction, decimal or a percent

3. Probability of 1 or 100%

4. Probability of 0 or 0%

5. Numerator is the number of favorable outcomes for the experiment or event Denominator is the number of ALL possible outcomes for the experiment or event # of favorable outcomes Total # of possible outcomes P (outcome) =

6. All possible outcomes that are NOT favorable. The sum of the probability of an event and its compliment is 1. EX: P(red tile) = 1/3 P(not red tile) = 2/3 P(red) + P(not red) = 1/3+2/3 = 3/3 or 1

7. The candy bowl has 10 Snickers, 3 Butterfingers, 7 Reese's, and 5 Babyruths. If you choose one at random, what is the probability that the candy you select will be a Snickers? First let’s add up how many total pieces of candy there are. 10 3 7 5+ 25

8. Now let’s write the probability as a fraction. 10 ÷ We can simplify this fraction. 25 10 5 5 2 5 =

9. At Pine Ridge Elementary School, 1 out of 10 of the students can’t swim. If a student is chosen at random from the school, what is the probability that the student knows how to swim?

10. If 10 kids were surveyed and 1 said they can’t swim, that means the other kids must be able to swim. 10 – 1 = 9 can swim 10 9