ProbabilityLesson 32 Power Up G Page 210

Probability

• The likelihood that a particular event will occur

• Chance: percent• Odds: ratio, 3:5

Probability

• Sample Space: A list of all possible outcomes• Example: Tossing a coin – heads, tails• Theoretical Probability: analyzing a situation• Experimental Probability: actually finding the

probability

Example 1

• The spinner is spun once. What is the probability, chance, and odds that the spinner will stop

a. on a 2?

b. on a prime number?2

3

3 2

1231

Example 2

• The spinner is spun twice. Find the probability of spinning• C once• not a D

A B

C D

Example 3

• A coin is flipped twice. What is the sample space?• What is the probability of getting at least a tails?

First tossSecond Toss

H THT

Example 4

• A coin is flipped three times. What is the sample space?• What is the probability of getting a tails at least two time?