Year 7 Probability Worksheet — Level 3 — Practice Set 2 — 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 2 — Answers
Write each probability as a fraction in simplest form.
1.A bag has 2 red, 5 blue and 1 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 8
- P(green) = 1/8 =
2.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
3.A bag has 3 red, 5 blue and 6 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 14
- P(red) = 3/14 =
4.A bag has 4 red, 6 blue and 6 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 16
- P(green) = 6/16 =
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 4 red, 3 blue and 3 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 10
- P(green) = 3/10 =
7.A fair six-sided die is rolled. What is the probability of rolling a prime number?
Answer:
- Favourable outcomes: 3 out of 6
8.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
9.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
10.A bag has 1 red, 2 blue and 4 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 7
- P(red) = 1/7 =
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