Probability Models

Probability Models: Part 1

What are probability models?

A probability model is a mathematical representation of a random event

. It is defined by its sample space, events within the sample space, and probabilities associated with each event.

Non-uniform Models

To represent the different odds present, some models are not uniform. For example, in this one, there is a greater chance of landing on Blue than Yellow or Red.

Dice

Dice are often used in probability models to represent the possible outcomes.

Multiple Choice

Which spinner has equally likely outcomes?

Multiple Choice

Use the spinner to find the probability.

P(not D) =

• 5

• 5/6

• 0.63

• 1/6

Multiple Choice

Tammy rolled a die five times.

Here is what she got on her five rolls: 1, 3, 3, 4, & 4

Find the experimental probability:

P(3) =

• 3/5

• 1/6

• 2/5

• 1/3

Multiple Choice

Jill rolled a "5" fifteen times out of 20 rolls on a dice.

What is the experimental probability as a SIMPLIFIED FRACTION!

• 3/7

• 3/6

• 3/5

• 3/4

Multiple Choice

Kate spun the spinner 75 times and landed on "3" thirty times.

What is the experimental probability as a percentage?

• 20%

• 30%

• 40%

• 50%

Multiple Choice

What is the probability of spinning green?

• 0
• 1/4
• 1/2
• 3/4