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