Year 9 Probability Worksheet — Level 1 — 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 1 — 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 fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favourable outcomes: 3 out of 6
3.A bag has 2 red, 1 blue and 1 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 4
- P(blue) = 1/4 =
4.A bag has 3 red, 6 blue and 1 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 10
- P(green) = 1/10 =
5.A bag has 4 red, 4 blue and 2 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 10
- P(blue) = 4/10 =
6.A bag has 3 red, 3 blue and 3 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 9
- P(green) = 3/9 =
7.A bag has 4 red, 3 blue and 2 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 9
- P(blue) = 3/9 =
8.A bag has 6 red, 2 blue and 6 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 14
- P(green) = 6/14 =
9.A fair six-sided die is rolled. What is the probability of rolling a multiple of 3?
Answer:
- Favourable outcomes: 2 out of 6
10.A bag has 5 red, 4 blue and 3 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 12
- P(blue) = 4/12 =
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
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