Grade 3 · Math · Unit 9 of 15
How Likely?
From impossible to certain
What your child practises
Using the words impossible, unlikely, equally likely, likely and certain, predicting from results, and noticing when the mean and mode of a data set match.
Ontario Curriculum expectation: D2.1, D2.2 · describing likelihood from impossible to certain, making predictions, and comparing the mean and mode
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Is the mean of this data the same as the mode?
3, 3, 3, 4, 2
- No, they are different
- Yes, they are the same
Show answer
Yes, they are the same
Hint: Find the mode (most common). Find the mean (add up, then divide by how many).
Question 2
How likely is this? “Tomorrow comes after today.”
- unlikely
- equally likely
- impossible
- certain
Show answer
certain
Hint: Ask yourself: can it happen? Will it always happen?
Question 3
Maya pulled a cube from a bag 10 times and put it back each time. She got red 8 times and yellow 2 times. Which colour is the bag likely to have more of?
- yellow
- the same of each
- red
Show answer
red
Hint: The colour that came out more often is probably in the bag more.
Question 4
Maya pulled a cube from a bag 10 times and put it back each time. She got purple 9 times and orange 1 time. Which colour is the bag likely to have more of?
- orange
- purple
- the same of each
Show answer
purple
Hint: The colour that came out more often is probably in the bag more.
Question 5
A bag holds the marbles shown. You pick one without looking. Picking red is…
🔴🔵🔵🔵🔵🔵🔵🔵- likely
- equally likely
- certain
- unlikely
Show answer
unlikely
Hint: Compare how many marbles are red with how many are blue.
Question 6
Is the mean of this data the same as the mode?
2, 3, 3, 3, 4
- Yes, they are the same
- No, they are different
Show answer
Yes, they are the same
Hint: Find the mode (most common). Find the mean (add up, then divide by how many).