7th Grade Probability Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 7th Grade probability worksheet.
7th Grade Probability Worksheet — Level 3 — Answers
Write each probability as a fraction in simplest form.
1.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
2.A bag has 5 red, 4 blue and 1 green marbles. One is chosen at random. What is the probability it is red?
Answer:
- Total marbles: 10
- P(red) = 5/10 =
3.A bag has 5 red, 1 blue and 3 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 9
- P(green) = 3/9 =
4.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
5.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
6.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
7.The probability that it rains tomorrow is . What is the probability that it does not rain?
Answer:
- P(not rain) = 1 − =
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, 6 blue and 6 green marbles. One is chosen at random. What is the probability it is green?
Answer:
- Total marbles: 13
- P(green) = 6/13 =
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.