Probability

Theoretical Probability is?

• What Should happen

• What does happen

• What Will Happen

• What I want to Happen

A dice (numbered 1-6) is rolled 20 times.  How many times will a number less than 4 show?

• 5

• 10

• 15

• Never

What is the probability of flipping a coin and getting heads?

• 1/2

• 1/3

• 1/4

• Never, Tails never fails.

If I flip a coin 10 times how many times should I get heads?

• 1

• 10

• 3

• 5

A compound event is..

• an event that directly causes another

• the probability of all the outcomes

• 1 event that creates 2 results

• when 2 or  more independent events work together

The spinner below is spun twice. What is the probability of the arrow landing on a 3 and then on an odd number?

• 1/3

• 1/9

• 2/9

• 2/6

What is the probability of randomly selecting an odd number from the numbers 1 -15?

• 8/15

• 1/2

• 7/15

• 1/8

Twelve students have an equally likely chance of being selected in a drawing at school. Eight are girls and four are boys. What is the probability that a boy will be selected?

• 1/4

• 1/3

• 1/8

• 3/4

A number cube is rolled. What is the likelihood that a number less than or equal to three is rolled?

• unlikely

• equally likely

• likely

• certain

Marty can go to one movie on either Friday or Saturday. His choice of movies includes a comedy or an action movie. Which list shows all of the possible outcomes of one movie on one day?

• Comedy, Friday

  Comedy, Saturday

  Action, Friday

  Action, Saturday

• Comedy, Action

  Action, Comedy

  Friday, Saturday

  Saturday, Friday

• Action, Friday

  Action, Saturday

• Comedy, Friday

  Action, Friday