12/7 Probabity

Basic Probability

Learning Objective: Students will determine the probability of an event.

Language Objective: Students will express their reasoning in written form.

Vocabulary

Probability: the likelihood of something happening. It is expressed as a number between 0 (will never happen) and 1 (will always happen). It can be expressed as a decimal, fraction, percentage or ratio.

Vocabulary

Experiment: an activity involving chance in which results are observed.

Trial: Each repetition of an experiment.

Outcomes: the result of a each trial.

Event: the set of one or more outcomes of an experiment.

Sample Space: the set of all possible outcomes of that experiment.

Sample Size

Sample size is all the possible outcomes.

The sampe size of a coin is
Head or Tails

Six Sided Dice

The sample size of a six sided dice is 1 2 3 4 5 & 6

Spinner

The sample size of this spinner is Green Blue Orange and Red

Favorable Outcome

Fill in the Blanks

​
 If you spin the spinner shown, what is probability of landing on red?
​

$\frac{favorable\ outcomes}{possible\ outcomes}$  

Multiple Select

A number cube is marked with 1, 2, 3, 4, 5, and 6 on its faces.

If you roll the cube one time, what is probability of landing on 2?

• $$\frac{1}{6}$$

• 2

• $$\frac{1}{2}$$

Poll

There are 6 equally possible outcomes on the spinner. What is the probability of spinning blue?

$$\frac{favorable\ outcome}{possible\ outcome}$$  

• $$\frac{1}{6}$$  

• $$\frac{2}{6}$$  

Multiple Choice

There are 6 equally possible outcomes on the spinner. What is the probability of spinning red?

$$\frac{favorable\ outcome}{possible\ outcome}$$   

• $$\frac{3}{6}$$  

• $$\frac{2}{6}$$  

Multiple Choice

What is the probability of flipping a quarter and having it land on heads ?

$$\frac{favorable\ outcome}{possible\ outcome}$$   

• $$\frac{1}{2}$$  

• $$2$$