Year 9 Probability Worksheet — Level 3 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 9 probability worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · ProbabilityYear 9 Probability Worksheet — Level 3 — Practice Set 4 — Answers
Write each probability as a fraction in simplest form.
1.A fair six-sided die is rolled. What is the probability of rolling an even number?
Answer:
- Favourable outcomes: 3 out of 6
2.A bag has 2 red, 5 blue and 3 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 10
- P(red) = 2/10 =
3.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
4.A bag has 1 red, 4 blue and 5 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 10
- P(blue) = 4/10 =
5.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
6.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
7.A fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favourable outcomes: 3 out of 6
8.A bag has 2 red, 1 blue and 4 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 7
- P(green) = 4/7 =
9.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
10.A bag has 2 red, 3 blue and 1 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 6
- P(green) = 1/6 =
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.