Probability

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Probability

• By Scott Mangum

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Mississippi Framework

• 3a - Investigate the probability and patterns in
  tossing coins, number cubes, and spinners.

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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.

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Vocabulary

• 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)
5
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?

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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)
7
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)
8
Ratios

• Ratio is a way you can express outcomes.

This is what Ratios look like. 2 to 23 or 223
or 2/23
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WHEEL of FORTUNE

• 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
10
WHEEL of FORTUNE

• 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
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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
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WHEEL of FORTUNE
WHY?
Let me demonstrate

• 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
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Monopoly

• Probability Experiment
• According to the property on the board. What are
  the chances that Eddie will land in jail?

1 of 40
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Monopoly

• 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.
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Monopoly

• 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
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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

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The Coin Toss

• Probability Experiment
• What are the chances that Shane will win the coin
  toss?

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