Name:    Lesson 7.3: Communicate about Probability

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

Keith has decided not to go camping over the long weekend because the weather report says that the probability of precipitation is 80%. Based on this information, which assumption has Keith made?

 a. There will be too much traffic on the roads over the long weekend. b. The campgrounds will be packed with people. c. Keith’s friends will not want to go camping. d. Weather reports are usually reliable.

2.

Karyn thinks that the probability of rolling a 2 when rolling a die is . Which assumption did Karyn NOT make?

 a. The die has only 1s and 2s on it. b. Each side of the die has an equal chance of landing up. c. The die has six sides. d. The die is numbered from one to six.

3.

Suppose you roll a regular die 10 times. Which is more likely to occur?
 a. 8 out of 10 rolls is a 6 c. 10 out of 10 rolls is a 3 b. 2 out of 10 rolls is a 4 d. 5 out of 10 rolls is a 1

4.

Suppose you roll a regular die 10 times. Which is less likely to occur?
 a. 3 out of 10 rolls is a 4 c. 1 out of 10 rolls is a 1 b. 2 out of 10 rolls is a 6 d. 9 out of 10 rolls is a 2

5.

Suppose you spin the spinner below 10 times. Which is more likely to occur?

 a. You land on blue 8 out of 10 times. c. You land on red 2 out of 10 times. b. You land on red 6 out of 10 times. d. You land on yellow 5 out of 10 times

6.

Suppose you spin the spinner below 10 times. Which is less likely to occur?

 a. You land on yellow 5 out of 10 times. b. You land on red 2 out of 10 times c. You land on blue 4 out of 10 times. d. You land on green 8 out of 10 times.

7.

Michael decided to take the train from Winnipeg to Moncton to visit his aunt. Which of these may have influenced Michael’s decision to take the train?
 a. The probability of having a car accident is greater than the probability of having an accident on a train. b. The proability of weather affecting the train ride is less than the probability of the weather affecting a flight. c. The probability of getting a seat on a train is greater than the probability of getting a seat on a bus. d. All of the above.