Probability & Probability Rule

Lesson 2-8

Vocabulary

Vocab Word Definition Example

Outcomes The number of results that might happen or can

happen

Probability The chance or likelihood that something will happen

Probability

*always presented in fraction form

# of desired outcomes -- # of what you want to happen # of total possible outcomes Total # of what can actually happen

ProbabilityUsing a die (or six sided-number cube):

What is the probability (P) of rolling a 5?

How many 5s on the die? How many sides on the die? Put the answer as a fraction…

What is the probability (P) of rolling a 2?What is the (P) of rolling an even #?What is P(number less than 8)?

ProbabilityUsing a spinner or pie chart…

What is the P(blue)?

What is the P(not blue)?

What is the P(pink)?

What is the P(green or yellow)?

Homework

p. 97-98 #1-9, 23-30