9th Grade Probability Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 9th Grade probability worksheet.
9th Grade 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 a prime number?
Answer:
- Favorable outcomes: 3 out of 6
2.A bag has 6 red, 5 blue and 1 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 12
- P(red) = 6/12 =
3.A fair six-sided die is rolled. What is the probability of rolling a multiple of 3?
Answer:
- Favorable outcomes: 2 out of 6
4.A fair six-sided die is rolled. What is the probability of rolling a number greater than 3?
Answer:
- Favorable outcomes: 3 out of 6
5.A bag has 6 red, 4 blue and 5 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 15
- P(blue) = 4/15 =
6.A bag has 4 red, 6 blue and 6 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 16
- P(red) = 4/16 =
7.A bag has 2 red, 4 blue and 4 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 10
- P(blue) = 4/10 =
8.A fair six-sided die is rolled. What is the probability of rolling a number greater than 1?
Answer:
- Favorable outcomes: 5 out of 6
9.A bag has 6 red, 2 blue and 1 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 9
- P(red) = 6/9 =
10.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
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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