Red Amber Level - Probability Revision - Mr. Widmer
Question 1
The probability of getting a green or pink result on this spinner is:
a)
b)
c)
d)
Question 2
Select all the correct answers.
When the probability of an event is calculated, it may be written as:
a) a fraction
b) a decimal
c) a percentage
d) a whole number bigger than 1
Question 3
A die is cast once. The probability that it is not a six is:
a.
b.
c.
Question 4
The Australian Platypus Conservancy website explains that:
'Platypi are most often glimpsed swimming on the surface of lakes or rivers in the early morning or evening.'
Jenny sees a platypus on the surface of the lake. The probability that it is midday is closer to:
a) 0 than to 0.5
b) 0.5 than to 0
c) 0.5 than to 1
d) 1 than to 0.5
Question 5
This diagram shows the number of students who study history and/or art.
How many students study both history and art?
Question 6
This diagram shows the number of students who study history and/or art.
How many students study history?
Question 7
Different ponds were tested for the presence of bacteria A and bacteria B.
If a pond is selected at random, what is the probability that it contains at least one of the bacteria?
Question 8
A’ represents:
a. the number of elements in A
b. the complement of A (not A)
Question 9
How many people at the concert were aged under 30 years?
Question 10
The table shows whether or not the animals in a small zoo have fur or claws.
What would be the probability of selecting an animal that had claws and/or fur? Give your answer as a percentage.
%
Question 11
The chance of this spinner landing on 2 is:
a.
b.
c.
d.
2%
5%
20%
50%
Question 12
Trial 1 Trial 2 Trial 3
Head
Head
Head
Sally tossed a coin 3 times and recorded the results.
What is the probability that Trial 4 will result in a tail?
Give your answer as a percentage.
%
Question 13
An experiment was run to collect the result from this spinner.
The most likely results from these options below would be:
a.
b.
c.
d.
blue = 6, red = 6, yellow = 6
blue = 10, red = 20, yellow = 4
blue = 5, red = 11, yellow = 6
blue = 22, red = 34, yellow = 24