Success Homeschool

Primary 2 Mathematics · Describing chance

Name: ______________________

Date: ____________

1. A dog will grow wings and fly. Which word describes this?
- ☐ (a) certain
- ☐ (b) likely
- ☐ (c) unlikely
- ☐ (d) impossible
2. Tomorrow will be the day after today. Which word describes this?
- ☐ (a) certain
- ☐ (b) likely
- ☐ (c) unlikely
- ☐ (d) impossible
3. A bag has 9 yellow counters and 1 green counter. Picking green is …
- ☐ (a) certain
- ☐ (b) likely
- ☐ (c) unlikely
- ☐ (d) impossible
4. A bag has 9 yellow counters and 1 green counter. Which colour are you more likely to pick?
5. A bag has only blue counters. Picking a blue counter is …
- ☐ (a) certain
- ☐ (b) likely
- ☐ (c) unlikely
- ☐ (d) impossible
6. A bag has only blue counters. Is picking a red counter certain, likely, unlikely or impossible?
7. You toss a coin. Which is true?
- ☐ (a) Heads is more likely than tails
- ☐ (b) Heads and tails are equally likely
- ☐ (c) Tails is impossible
8. You toss a coin 3 times and get heads every time. What about the next toss?
- ☐ (a) It must be tails now
- ☐ (b) It must be heads again
- ☐ (c) Heads and tails are still equally likely

Answer sheet

1. impossible — Dogs cannot grow wings, so this cannot happen. It is impossible.
2. certain — This will definitely happen, so it is certain.
3. unlikely — There is only 1 green out of 10 counters, so it could happen but probably will not. It is unlikely.
4. yellow — There are many more yellow counters, so yellow is more likely.
5. certain — Every counter is blue, so you will definitely pick blue. It is certain.
6. impossible — There are no red counters in the bag, so it cannot happen.
7. Heads and tails are equally likely — A fair coin has one heads side and one tails side, so each is equally likely.
8. Heads and tails are still equally likely — A coin does not remember earlier tosses. Each toss is a fresh, equal chance.