Probability

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

In a game the player wins if he rolls a 4 on a number cube. If the number cube is rolled 24 times, then what is a reasonable prediction for the number of unsuccessful rolls?

• 5

• 20

• 4

• 24

Which of the following has a certain likelihood of occurring?

• A field goal will be made by the kicker

• There is a 70% of rain on Monday

• Next month has at least 29 days

• A coin will land on either heads or tails

Two coins are flipped. What is the probability that both of the coins land heads up?

• 1/2

• 1/4

• 1/6

• 1

Two number cubes are rolled sequentially. What is the probability that the first number cube shows a five and the other number cube shows an even number?

• 1/12

• 1/6

• 1/2

• 11/12

The letters in the word AUGUST are placed into a bag. What is the probability of selecting a U?

• 2/5

• 1/3

• 3/5

• 3/6

Michael has a set of five cards shown below. Michael will randomly select a card, not replace it, and then select another card. What is the probability that he selects a prime number and then a 1?

• 3/20

• 1/5

• 4/5

• 3/25

What is the probability of the arrow stopping on “X” on the first spin and “F” on the second spin?

• 5/6

• 1/36

• 1/3

• 1/6

What are the possible outcomes of spinning this spinner?

• Red, Blue, Purple, Green, Yellow, Pink

• 2 red and 2 green

• Pink

• 8