Probability Review

Anita does a probability experiment by spinning a spinner one time and flipping a coin one time. The spinner has four congruent sections: red, green, blue, and yellow. The coin can land on heads or tails.

In the following diagram, each event is represented by its first letter. (For example, H represents heads.) Which diagram shows all possible outcomes?

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A math teacher surveys 10 randomly selected students in her classes. She finds that 7 of the 10 students speak more than one language fluently. Based on this information, how many of her 140 students could be expected to speak more than one language fluently?

• 20 students

• 96 students

• 98 students

• 137 students

A bag of markers contains:

4 yellow markers

6 green markers

2 red markers

3 pink markers

5 purple markers

A marker will be randomly selected from the bag and then replaced. Then another marker will be randomly selected from the bag. What is the probability that a yellow marker will be selected both times?

The spinner is divided into congruent sections that are labeled from 1 through 5.

Alex spins the spinner one time. What is the probability of the arrow NOT landing on a section labeled with an even number?

Marlena has a bag of coins. The bag contains 8 quarters, 10 dimes, 4 nickels, and 2 pennies. She will randomly select a coin from the bag. What is the probability that Marlena will select a nickel?

These magazines are on a table at Josh's dentist's office.

2 movie magazines

6 news magazines

3 sports magazines

1 food magazine

3 nature magazines

Josh will randomly choose a magazine, put it back, and then choose another magazine. What is the probability the he will choose a movie magazine and then a nature magazine?

Bryan has a bag containing 12 red marbles, 8 blue marbles, 5 green marbles, and 3 yellow marbles. He will randomly select one marble from the bag. What is the probability that Bryan will select a red marble?

The table shows the number and types of buttons in a bin

Mr. Davis selects a button at random. Based on the information in the table, which statement is true?

• The button is least likely to be a golf button.

• The button is less likely to be a racquetball than a golf button.

• The button is just as likely to be a baseball as a tennis button or racquetball.

• The button is more likely to be a tennis button than a baseball.

A cafeteria manager surveyed students to find out their favorite lunch. The results are shown in the table.

One student is chosen at random. Based on the results, which statement is true?

• The student's favorite lunch is more likely to be spaghetti than pizza.

• The student's favorite lunch is equally likely to be salad or vegetable plate

• The student's favorite lunch is 4 times as likely to be spaghetti as any other food.

• The student's favorite lunch is twice as likely to be pizza as a hamburger.

Evelyn has a movie DVD collection in a drawer. The table shows the number of DVDs for each type of movie.

Evelyn selects a DVD at random. Based on the information in the table, which statement is true?

• The DVD is less likely to be an animation movie than all the other movie types combined.

• The DVD is more likely to be a drama than a comedy.

• The DVD is more likely to be an animation movie than an action movie.

• The DVD is equally likely to be an animation movie or another movie type.