Topic: Probability

Vocabulary Probability is the chance that an event will occur. Ratio is a way you can express outcomes. Possible outcome is the different way an experiment can turn out. Favorable outcome is the outcome your looking for in an experiment. Total outcomes are the outcomes that happen in an experiment.

Examples Probability experiments: Spinning a spinner. Rolling dice. Flipping coins. Games that involve chance. Formula Number of favorable outcomes Total number of outcomes Probability (P) =

WHEEL of FORTUNE Probability Experiment There are 23 places the wheel can stop. Kellie will spin the WHEEL once. What is the possible outcome the spinner will stop on Bankrupt?

What is the possible outcome the spinner will stop on Bankrupt? There are 23 places the wheel can stop. What are the total number of outcomes? P = 23 Number of favorable outcomes Total number of outcomes Probability (P) =

What is the possible outcome the spinner will stop on Bankrupt? There are 23 places the wheel can stop. What are the number of favorable outcomes? 2 What is our Probability? P = 23 Number of favorable outcomes Total number of outcomes Probability (P) =

This is what Ratios look like. Ratio is a way you can express outcomes. This is what Ratios look like. 2 to 23 or 2:23 or 2/23

WHEEL of FORTUNE 5 of 23 Probability Experiment There are 23 places the wheel can stop. Derrick will spin the WHEEL once. What is the possible outcome the spinner will stop on red? 5 of 23

WHEEL of FORTUNE 12 of 69 Probability Experiment There are 23 places the wheel can stop. Neil will spin the WHEEL three times. What is the possible outcome the spinner will stop on yellow? 12 of 69

WHEEL of FORTUNE WHY? If there are 23 places the wheel can stop. Neil spins the WHEEL three times. AND there are four yellow stops. You should multiply the numerator and the denominator by three. 12 of 69

WHY? WHEEL of FORTUNE 12 4 3 = 23 69 Let me demonstrate X If there are 23 places the wheel can stop. Neil spins the WHEEL three times. AND there are four yellow stops. You should multiply the numerator and the denominator by three. 12 4 3 = X 23 69

Andy has 3 pairs of pants: 1 gray, 1 blue, and 1 black Andy has 3 pairs of pants: 1 gray, 1 blue, and 1 black. He has 2 shirts: 1 white, and 1 red. If Andy picks 1 pair of pants and 1 shirt, how many different outfits does he have?

Andy can choose 1 of 3 pairs of pants and 1 of 2 shirts Andy can choose 1 of 3 pairs of pants and 1 of 2 shirts. A tree diagram can help you count his choices. pants shirts gray white red blue white black white 3 × 2 = 6 different outfits

You can also use the counting principle. n × m = n × m first second total choices choices choices × =

Monopoly 1 of 40 Probability Experiment According to the property on the board. What are the chances that Eddie will land in jail? 1 of 40

Monopoly WRONG 4 of 40 Probability Experiment According to the property on the board. What are the chances that Billy will land on a Rail Road? 4 of 40 WRONG You must reduce if you can.

Monopoly 4/40 ÷ 4 = 1/10 Probability Experiment According to the property on the board. What are the chances that Billy will land on a Rail Road? 4/40 ÷ 4 = 1/10

A Roll of the Dice If Heather rolls a die once (a die is one of two dice). What are her chances of rolling a six? 1 of 6 If Carlie rolls a pair of dice twice. What are her chances of rolling ten? 2/24 reduced to 1/12

The Coin Toss 1 of 2 Probability Experiment What are the chances that Shane will win the coin toss? 1 of 2