Probability Test Review

A letter is chosen from the word shown. Mississippi Which describes the probability of randomly choosing a M?

• not possible

• unlikely

• likely

• certain

Emilio randomly asks his classmates what month they were born. He finds that 15 out of 100 classmates were born in July. If there are 1,500 students in Emilio’s school, about how many students can he expect to have birthdays in July based on the experimental probability?

• 100 students

• 1,500 students

• 15 students

• 225 students

A radio station plays a variety of music to attract as large an audience as possible. Each hour it plays 6 classic rock songs, 4 country songs, 5 pop songs, and 5 rap songs. What is the probability that the first song played will be a country song written as a percent?

• 20%

• 50%

• 80%

• 75%

The probability of Jan’s school bus running late is 3/8. In 168 days of riding the bus, how many times can Jan expect it to be late? Show your work.

• 45
• 72
• 81
• 63

There are 12 red cards, 17 blue cards, 14 purple cards, and 7 yellow cards in a hat. In a trial, a card is drawn from the hat and then replaced 1,500 times. Write a proportion that can be used to predict the number of times a yellow card is drawn.

• 7/50 = x/1500

• 7/1500 = x/100
• 7/1500 = x/300
• 7/1500 = x/200

There are 12 red cards, 17 blue cards, 14 purple cards, and 7 yellow cards in a hat. In a trial, a card is drawn from the hat and then replaced 1,500 times. Write a proportion that can be used to predict the number of times a yellow card is drawn. Use the proportion from the previous question to answer the following:

How many times is a yellow card drawn? (4 pts)

• 190
• 210
• 180
• 150

Tammy rolls a 6 sided dice and then tosses a coin. List the sample space or draw a chart for the possible outcomes

• (1, H), (1, T), (2, H), (2, T), (3, H), (3, T), (4, H), (4, T), (5, H), (5, T), (6, H)
• (1, T), (2, H), (3, T), (4, H), (5, T), (6, H)
• {(1, H), (1, T), (2, H), (2, T), (3, H), (3, T), (4, H), (4, T), (5, H), (5, T), (6, H), (6, T)}
• (1, H), (2, T), (3, H), (4, T), (5, H), (6, T)