Theoretic Probability of Simple Events

Miss Ward spins a wheel to determine the number of homework problems to assign. There are 20 sections labeled 1–20. What is the probability that there will be fewer than 13 problems assigned for homework?

• 13/20

• 3/5

• 4/9

• 7/20

Jose randomly selected a block like the ones shown from a bag.  What is the probability that he will choose a cube with a number less than 5?

• ⅔

• ⅙

• ⅓

• ⅚

The chart shows the number of times a marble was selected randomly from a bag.  What is the probability that the marble selected is NOT green or blue?

• 21/38

• 10/28

• 5/14

• 17/38

Julian selects a card at random from the cards shown.  What is the probability that the card Julian selects is a polygon? ( A polygon is a shape with 3 or more straight sides)

• ½

• ⅓

• ⅔

• ⅚

A bag of markers has 4 red markers, 5 blue markers, 3 yellow markers, and 3 green markers. If Maria pulls out a marker without looking, what is the probability he will NOT pull out a blue marker?

• 5/10

• 1/3

• 4/15

• 2/3

A small bag of jelly beans contains 2 lemons, 4 cherry, 1 lime, and 3 blueberry jelly beans. If Jessica chooses a jellybean without looking, what is the probability it will be cherry or blueberry?

• 3/10

• 7/10

• 1/2

• 1/4

Which event or complement has a probability of ¼?

• P(yellow)

• P(NOT blue or orange)

• P(yellow or green)

• P(NOT green)

Without looking, Ashley selected a tile from the tiles shown.  What is the probability she will NOT choose a prime number? ( A prime number is any number with 1 and itself as factors)

• ⅗

• ⅖

• ½

• 4/9

What is the probability of spinning the spinner and having it land on RED?

• ⅓

• ½

• ⅔

• ⅚

The chart shows the number of students in Mr. Morales' Geometry class.  If a student is selected at random, which expression can be used to determine the probability the student will NOT be a male freshman?

•  - (23/30)

• + (7/30)

• + (23/30)

• - (7/30)