Year 7 Probability Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 7 probability worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · ProbabilityYear 7 Probability Worksheet — Level 1 — Practice Set 2 — Answers
Write each probability as a fraction in simplest form.
1.A bag has 1 red, 6 blue and 4 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 11
- P(blue) = 6/11 =
2.A bag has 2 red, 4 blue and 4 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 10
- P(red) = 2/10 =
3.A fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favourable outcomes: 3 out of 6
4.A bag has 3 red, 1 blue and 5 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 9
- P(red) = 3/9 =
5.A bag has 3 red, 3 blue and 4 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 10
- P(red) = 3/10 =
6.A bag has 4 red, 1 blue and 5 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 10
- P(green) = 5/10 =
7.A bag has 5 red, 1 blue and 4 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 10
- P(blue) = 1/10 =
8.A bag has 3 red, 2 blue and 3 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 8
- P(red) = 3/8 =
9.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 =
10.A bag has 1 red, 6 blue and 2 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 9
- P(blue) = 6/9 =
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.
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