Success TutoringWorksheets

9th Grade Probability Worksheet — Level 3 — Practice Set 4 — Answers

Answer sheet with worked solutions for the 9th Grade probability worksheet.

Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Probability

9th Grade Probability Worksheet — Level 3 — Practice Set 4 — Answers

Write each probability as a fraction in simplest form.

1.A bag has 4 red, 2 blue and 6 green marbles. One is chosen at random. What is the probability it is red?

Answer:

  1. Total marbles: 12
  2. P(red) = 4/12 =
2.A bag has 4 red, 3 blue and 3 green marbles. One is chosen at random. What is the probability it is red?

Answer:

  1. Total marbles: 10
  2. P(red) = 4/10 =
3.A fair six-sided die is rolled. What is the probability of rolling an even number?

Answer:

  1. Favorable outcomes: 3 out of 6
4.The probability that it rains tomorrow is . What is the probability that it does not rain?

Answer:

  1. P(not rain) = 1 − =
5.The probability that it rains tomorrow is . What is the probability that it does not rain?

Answer:

  1. P(not rain) = 1 − =
6.A fair six-sided die is rolled. What is the probability of rolling a prime number?

Answer:

  1. Favorable outcomes: 3 out of 6
7.The probability that it rains tomorrow is . What is the probability that it does not rain?

Answer:

  1. P(not rain) = 1 − =
8.The probability that it rains tomorrow is . What is the probability that it does not rain?

Answer:

  1. P(not rain) = 1 − =
9.The probability that it rains tomorrow is . What is the probability that it does not rain?

Answer:

  1. P(not rain) = 1 − =
10.The probability that it rains tomorrow is . What is the probability that it does not rain?

Answer:

  1. P(not rain) = 1 − =
Free worksheets at worksheets.successtutoring.com · © Success Tutoring · Free for personal and classroom use

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.