Theoretical Probability

A container has 1 blue block and 3 yellow blocks. You want to make the probability of randomly selecting a green block equal to 50%. How many green blocks should you add?

• 1 green block

• 4 green blocks

• 10 green blocks

• 5 green blocks

The game show host asks students to choose a marble at random. What is another way to describe the word random?

• To select based on the color most preferred

• To select all the marbles at one time

• To select the color of marbles least preferred

• To select with no regard to order or preference
  

A dartboard has 4 equal sections, of which 2 are orange.
What is the probability that a dart will land in an orange section?

• 1/2

• 2/4

• 50%

• All of the above

An amusement park has 18 attractions, including 8 arcades.
What is the probability that a randomly selected attraction at this amusement park will be an arcade?

• 8/18

• 4/9

• 44%

• All of the above

Shannon has a bag of jelly beans. She removed on jelly bean, recording the color, and then replaced it. She repeated the process several times and record her results in the table. What is the experimental probability of her selecting a red jelly bean?

• 11/33

• 1/3

• 11/44

• 18/26

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

• 1

• 10

• 3

• 5

You randomly choose one marble from the bag. What is the theoretical probability of choosing a blue marble?

Three coins are flipped. Using the tree diagram, how often would you expect to flip 1 tails and 2 heads (in any order)? Write your answer as a fraction, decimal, or percent.

Monica randomly picks 2 marbles from a bag. She keeps each marble after she picks it. The bag contains 11 plastic marbles, 9 wooden marbles, 7 glass marbles, and 8 metal marbles.

If she picks a metal marble the first time, what is the probability she will pick a second metal marble? You can write your answer as a fraction, decimal, or percent.

Use the Fundamental Counting Principle to find the total number of possible outcomes.