Year 7 Probability Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 7 probability worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · ProbabilityYear 7 Probability Worksheet — Level 3 — Practice Set 3 — Answers
Write each probability as a fraction in simplest form.
1.A bag has 2 red, 5 blue and 2 green marbles. One is chosen at random. What is the probability it is blue?
Answer:
- Total marbles: 9
- P(blue) = 5/9 =
2.A fair six-sided die is rolled. What is the probability of rolling a number greater than 3?
Answer:
- Favourable outcomes: 3 out of 6
3.A bag has 4 red, 1 blue and 1 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 6
- P(green) = 1/6 =
4.A fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favourable outcomes: 3 out of 6
5.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
6.A bag has 3 red, 2 blue and 5 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 10
- P(green) = 5/10 =
7.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
8.A bag has 6 red, 3 blue and 4 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 13
- P(red) = 6/13 =
9.A bag has 2 red, 5 blue and 5 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 12
- P(red) = 2/12 =
10.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
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