Probability Test (Year 8)

Welcome to the Year 8 Probability Test.

Please read the following instructions before you start.

1) Make sure that you have joined using your REAL name (if not, quit now and join again using your real name). You'll receive a zero if you fail to use your own real name.

2) You have up to 60 minutes to complete the test. Any questions attempted after the time limit will not be marked.

3) There is no specific time limit on each question.

4) Some questions contain a picture and may take a few seconds to load. Be patient.

5) You can use your calculator and bound reference during the test.

6) You must complete the test independently.

7) You need a pen and a work book (or sheets of blank paper) to work out some of the questions. Get them ready before you proceed.

8) You can attempt the test once ONLY. Only if you have technical issues, you can restart the test .

9) After you finish the test, you will see a result. However, your actual result might be different. Your actual result will be updated on Compass.

Do you fully understand the above instructions?

• Yes, I understand fully

• Yes, I fully understand

When rolling a standard die:

a) How many outcomes are there?

b) What is the probability of rolling a 2?

c) Are the chances of rolling a 3 or a 6 the same?

• 3; 0; No

• 6; 1/6; Yes

• 3; 2/6; No

• 6; 2/6; Yes

When rolling a unbiased coin;:

a) How many outcomes are there?

b) What is the probability of getting a head?

c) Are the chances of getting a head or a tail the same?

• 1; 1/2; yes

• 2; 1/2; yes

• 3; 1/3; No

• 2; 1/3; No

Choose the option which describes the probability correctly

• A:impossible B:unlikely C:even chance

• A:possible B:unlikely C:even chance

• A:impossible B:likely C:even chance

• A:impossible B:even chance C:likely

Choose the option which describes the probability correctly

• C:even chance; D:unlikely; E:certain

• C:even chance; D:likely; E:certain

• C:impossible; D:likely; E:certain

• C:even chance; D:likely; E:impossible

Consider the spinner you see. Find the probability of getting

a) yellow

b) blue

• a) 1/5 or 50%; b) 1/4 or 25%

• a) 1/5 or 0.5; b) 1/4 or 0.4

• a) 1/2 or 50%; b) 0.25 or 250%

• a) 1/2 or 0.5; b) 1/4 or 25%

Consider the spinner you see. Find the probability of getting

a) green

b) red

• a) 1/8; b) 1/4

• a) 1/8; b) 12.5%

• a) 0.125; b) 1/4

• a) 1/16; b) 1/16

Jim thinks that when you toss two unbiased coins and you will most likely to get a head and a tail.

Is he right?

• No

• Yes

• It depends

Leah has worn a yellow shirt on 6 of the last 15 days. How likely is she in yellow tomorrow?

• 6/21

• 1/6

• 2/5

• 1/15

In a restaurant, 5 customers ordered a pizza, another 6 went for a burger and the rest 4 asked for a sandwich. Now the next customer comes in, what is the experimental probability of he ordering a pizza?

• 0

• 1/3

• 30%

• 5:6:4