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Year 7 Probability Worksheet — Level 1 — Answers

Answer sheet with worked solutions for the Year 7 probability worksheet.

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Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Probability

Year 7 Probability Worksheet — Level 1 — Answers

Write each probability as a fraction in simplest form.

1.A bag has 4 red, 3 blue and 4 green marbles. One is chosen at random. What is the probability it is red?

Answer:

  1. Total marbles: 11
  2. P(red) = 4/11 =
2.A bag has 2 red, 1 blue and 6 green marbles. One is chosen at random. What is the probability it is blue?

Answer:

  1. Total marbles: 9
  2. P(blue) = 1/9 =
3.A fair six-sided die is rolled. What is the probability of rolling a number greater than 5?

Answer:

  1. Favourable outcomes: 1 out of 6
4.A fair six-sided die is rolled. What is the probability of rolling a number greater than 4?

Answer:

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

Answer:

  1. Total marbles: 14
  2. P(green) = 4/14 =
6.A fair six-sided die is rolled. What is the probability of rolling a prime number?

Answer:

  1. Favourable outcomes: 3 out of 6
7.A fair six-sided die is rolled. What is the probability of rolling a multiple of 3?

Answer:

  1. Favourable outcomes: 2 out of 6
8.A bag has 3 red, 4 blue and 2 green marbles. One is chosen at random. What is the probability it is green?

Answer:

  1. Total marbles: 9
  2. P(green) = 2/9 =
9.A bag has 3 red, 1 blue and 6 green marbles. One is chosen at random. What is the probability it is red?

Answer:

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

Answer:

  1. Favourable outcomes: 3 out of 6
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