9th Grade Probability Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 9th Grade probability worksheet.
9th Grade Probability Worksheet — Level 1 — Practice Set 3 — Answers
Write each probability as a fraction in simplest form.
1.A fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favorable outcomes: 3 out of 6
2.A fair six-sided die is rolled. What is the probability of rolling a number greater than 5?
Answer:
- Favorable outcomes: 1 out of 6
3.A bag has 3 red, 6 blue and 6 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 15
- P(blue) = 6/15 =
4.A bag has 2 red, 6 blue and 1 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 9
- P(red) = 2/9 =
5.A fair six-sided die is rolled. What is the probability of rolling a multiple of 3?
Answer:
- Favorable outcomes: 2 out of 6
6.A bag has 6 red, 5 blue and 6 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 17
- P(red) = 6/17 =
7.A bag has 4 red, 6 blue and 4 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 14
- P(red) = 4/14 =
8.A bag has 6 red, 3 blue and 3 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 12
- P(red) = 6/12 =
9.A bag has 6 red, 1 blue and 2 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 9
- P(green) = 2/9 =
10.A bag has 3 red, 6 blue and 3 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 12
- P(green) = 3/12 =
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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