Mastering Probability Scale
Mathematics
Year 9
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A worksheet covering Probability Scale for Year 9 students.
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Mastering Probability Scale
Subject: MathematicsGrade: Year 9
Name:
Date:
Untitled Worksheet
Grade Year 9
A
Introduction
Review the probability scale from 0 (impossible) to 1 (certain). Probabilities are expressed as fractions, decimals, or percentages that correspond to points on this scale.
B
Practice Questions
Answer all questions. Show your working in the grid spaces provided.
1.
What is the probability of flipping a fair coin and getting heads?
[1 mark]2.
Express the probability of drawing an ace from a standard deck of 52 cards as a decimal.
[1 mark]3.
A spinner is divided into 8 equal sections numbered 1 to 8. What is the probability of landing on an even number?
[1 mark]4.
If the probability of rain tomorrow is 0.3, what is the probability that it will not rain?
[1 mark]5.
Calculate the probability as a fraction: rolling a total of 7 with two dice.
[2 marks]6.
What is the probability of selecting a vowel (A, E, I, O, U) from the alphabet?
[1 mark]7.
A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of picking a blue marble?
[1 mark]8.
A game involves spinning a wheel with sections labeled 1, 2, 3, 4, 5, and 6. What's the probability of landing on a number greater than 4?
[1 mark]9.
A card is drawn at random from a deck. What is the probability that it is a king or a queen?
[1 mark]10.
A student rolls two dice. What is the probability that the sum is 12?
[1 mark]11.
Challenge: In a survey, 70% of people prefer tea over coffee. If 10 people are randomly selected, what is the probability that exactly 7 prefer tea?
[3 marks]12.
Real-world application: A school has 200 students, 60% of whom participate in sports. If a student is chosen at random, what is the probability they do not participate in sports?
[2 marks]Quick Actions
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Details
- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
- worksheet