The faces on a twenty-sided die are labelled $0.05, $0.10, $0.15, … , $1.00.
The die is rolled once.
What is the probability that the amount showing on the upper face is more than 50 cents but less than 80 cents?
A.
B.
C.
D.
Measurement, STD2 M7 2016 HSC 28a
Jacob has a large jar of silver coins. He adds 20 gold coins into the jar. He then seals the jar and shakes it to ensure that the gold coins are mixed in thoroughly with the silver coins. Jacob then opens the jar and takes a handful of coins. In his hand he has 33 silver coins and 4 gold coins.
- Based on Jacob’s handful, if a coin is selected at random from the jar, what is the probability that it is a gold coin? (1 mark)
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- Jacob returns the handful of coins to the jar. Estimate the total number of coins in the jar. (2 marks)
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Probability, STD2 S2 2015 HSC 26e
The table shows the relative frequency of selecting each of the different coloured jelly beans from packets containing green, yellow, black, red and white jelly beans.
- What is the relative frequency of selecting a red jelly bean? (1 mark)
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- Based on this table of relative frequencies, what is the probability of NOT selecting a black jelly bean? (1 mark)
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Probability, STD2 S2 2005 HSC 11 MC
The diagram shows a spinner.
The arrow is spun and will stop in one of the six sections.
What is the probability that the arrow will stop in a section containing a number greater
than 4?
Probability, STD2 S2 2005 HSC 23a
There are 100 tickets sold in a raffle. Justine sold all 100 tickets to five of her friends. The number of tickets she sold to each friend is shown in the table.
- Justine claims that each of her friends is equally likely to win first prize.
Give a reason why Justine’s statement is NOT correct. (1 mark)
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- What is the probability that first prize is NOT won by Khalid or Herman? (2 marks)
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Probability, STD2 S2 2008 HSC 16 MC
A bag contains some marbles. The probability of selecting a blue marble at random from this bag is
Which of the following could describe the marbles that are in the bag?
-
blue, red -
blue, red -
blue, red, green -
blue, red, green
Probability, STD2 S2 2010 HSC 23c
On Saturday, Jonty recorded the colour of T-shirts worn by the people at his gym. The results are shown in the graph.
- How many people were at the gym on Saturday? (Assume everyone was wearing a T-shirt). (1 mark)
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- What is the probability that a person selected at random at the gym on Saturday, would be wearing either a blue or green T-shirt? (1 mark)
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Probability, STD2 S2 2010 HSC 8 MC
A bag contains red, green, yellow and blue balls.
The table shows the probability of choosing a red, green, or blue ball from the bag.
If there are 12 yellow balls in the bag, how many balls are in the bag altogether
- 16
- 36
- 48
- 60
Probability, STD2 S2 2013 HSC 1 MC
Which of the following events would be LEAST likely to occur?
- Tossing a fair coin and obtaining a head
- Rolling a standard six-sided die and obtaining a 3
- Randomly selecting the letter 'G' from the 26 letters of the alphabet
- Winning first prize in a raffle of 100 tickets in which you have 4 tickets