Probability

Likelihood

Name: ______________________________Date: ______________Score: ______ / 20

1.
A coin is just as likely to land heads as tails. How would you describe getting heads?
1. AImpossible
2. BUnlikely
3. CAn even chance
4. DCertain
2.
Where does 'You will live to be 200 years old' belong on the likelihood scale?
1. AImpossible
2. BUnlikely
3. CEven chance
4. DCertain
3.
A spinner has the numbers 1, 2, 3, 4 and 5. How likely is it to spin a 5?
1. AImpossible
2. BUnlikely
3. CEven chance
4. DCertain
4.
Put these likelihood words in order from least likely to most likely.
Write the order (least likely to most likely) in the boxes:
- ?likely
- ?impossible
- ?certain
- ?even chance
- ?unlikely
5.
An event that is certain will definitely happen.
True False
6.
An impossible event has an even chance of happening.
True False
7.
A bag holds 1 yellow ball, 1 red ball and 2 green balls. The probability of taking a red ball is ___ out of 4.
8.
A bag holds 1 yellow ball, 1 red ball and 2 green balls. The probability of taking a yellow ball is ___ out of 4.
9.
A bag holds 1 yellow ball, 1 red ball and 2 green balls. The probability of taking a green ball is ___ out of 4.
10.
A spinner is numbered 1 to 8. The probability of landing on 8 is ___ out of 8.
11.
A spinner is numbered 1 to 8. The probability of landing on either 1 or 5 is ___ out of 8.
12.
A spinner is numbered 1 to 8. The probability of landing on a number greater than 7 is ___ out of 8.
13.
A spinner is numbered 1 to 8. The probability of landing on a number less than 3 is ___ out of 8.
14.
A spinner is numbered 1 to 8. The probability of landing on a number that is NOT 1 or 5 is ___ out of 8.
15.
A bag holds 1 yellow, 1 red and 2 green balls. Write the probability of taking a green ball as a percentage.
%
16.
A spinner is numbered 1 to 8. Write the probability of landing on an even number as a percentage.
%
17.
On a weather forecast, what does a higher percentage chance of rain mean?
1. AIt is more likely to rain
2. BIt is less likely to rain
3. CIt is impossible for it to rain
4. DIt is certain to rain
18.
A forecast gives these chances of rain at different times: 14%, 20%, 32% and 16%. When is it most likely to rain?
1. AAt the 14% time
2. BAt the 20% time
3. CAt the 32% time
4. DAt the 16% time
19.
An even chance can be written as 50%.
True False
20.
You have three cards showing 1, 3 and 4. You are equally likely to take a 1 or a 4.
True False

Answer key

Probability — Likelihood

1.C. An even chance
2.A. Impossible
3.B. Unlikely
4.impossible, unlikely, even chance, likely, certain
5.True
6.False
7.1
8.1
9.2
10.1
11.2
12.1
13.2
14.6
15.50 %
16.50 %
17.A. It is more likely to rain
18.C. At the 32% time
19.True
20.True