8th Grade Probability Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 8th Grade probability worksheet.
8th Grade Probability Worksheet — Level 3 — 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 an even number?
Answer:
- Favorable outcomes: 3 out of 6
2.A fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favorable outcomes: 3 out of 6
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 2 red, 1 blue and 6 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 9
- P(red) = 2/9 =
5.A bag has 2 red, 3 blue and 4 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 9
- P(blue) = 3/9 =
6.A fair six-sided die is rolled. What is the probability of rolling a number greater than 4?
Answer:
- Favorable outcomes: 2 out of 6
7.A bag has 5 red, 3 blue and 1 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 9
- P(red) = 5/9 =
8.A bag has 4 red, 3 blue and 5 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 12
- P(blue) = 3/12 =
9.A bag has 1 red, 1 blue and 3 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 5
- P(red) = 1/5 =
10.A bag has 5 red, 6 blue and 5 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 16
- P(red) = 5/16 =
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.