Intro to Probability

Probability is ...

• a measure of the likelihood that some event will occur.

• a game that involves coins.

• a guarantee.

• a game that involves dice

Probability can be written as ...

• a fraction
• a decimal
• a percent
• all of the above

A likely event is closer to what number?

• 0

• 1

• .5

• 2

An unlikely event is closer to what number?

• 0

• 1

• .5

• 2

Is the spinner more likely or less likely to land on green than yellow?

• more likely
• less likely

Rolling a 9 on a standard single number cube is...

• Impossible

• Certain

• Unlikely

• Equally Likely as Not

What is an outcome?

• The result of an experiment or trial

• The chance or likelihood of an event

• A fraction, decimal, or a percent

• An activity that gives various results

Theoretical Probability is:

• What is expected to happen

• What actually happens

• What will happen

• What I hope happens

Experimental Probability is:

• What will happen

• What actually happens

• What is expected to happen

• What I hope happens

What is the probability of a coin flip landing on heads?

• 1/2

• 1/3

• 1/4

• 0, tails never fails.