Grade 5 · Math · Unit 13 of 13
Graphs & Chance
Double bar graphs and probability
What your child practises
Reading double bar graphs where each square stands for several items (many-to-one), comparing two sets of data, and describing the probability of single outcomes with spinners, marbles, dice and coins.
New Brunswick Curriculum skill descriptor: Statistics and Probability: Data Analysis, Statistics and Probability: Chance and Uncertainty · first- and second-hand data, double bar graphs, and the likelihood of outcomes
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
The spinner has 6 equal sections. What is the probability that it lands on green? Write it as a fraction.
answer box
4/6
Hint: Probability = number of green sections ÷ total number of equal sections. Any equivalent fraction counts.
Question 2
On a graph, each ⭐ stands for 5 votes. How many ⭐ are needed to show 30 votes?
- 12
- 5
- 6
- 7
6
Hint: Divide the votes by 5, because each ⭐ is worth 5.
Question 3
In the evening, how many more visitors came on Sunday than on Saturday?
Visitors to the pool (each square = 5 visitors) Time 🟦 Saturday 🟧 Sunday Morning 🟦🟦🟦🟦🟦 🟧🟧🟧🟧 Afternoon 🟦🟦🟦🟦 🟧 Evening 🟦🟦 🟧🟧🟧 answer box
5
Hint: Find how many more squares one bar has than the other, then multiply by 5. Or find both amounts and subtract.
Question 4
Ana flipped a coin 10 times and got 7 heads. Which statement is true?
- The coin must be broken.
- Every 10 flips will give 7 heads.
- The next flip will surely be tails.
- This can happen; small experiments often don't match what we expect.
This can happen; small experiments often don't match what we expect.
Hint: Each flip is still a 1 in 2 chance. With only a few flips, results can be uneven; with many flips, they get closer to half.
Question 5
You pick one marble from this bag without looking. What is the probability that it is red?
🟡🔵🔵🔴🔴🔴- 3/3
- 3/7
- 3/6
- 1/3
3/6
Hint: Probability = number of red marbles ÷ total number of marbles.
Question 6
How many books did Class A read in October?
Books read (each square = 5 books) Month 🟦 Class A 🟧 Class B September 🟦🟦🟦🟦 🟧🟧🟧 October 🟦🟦🟦 🟧 November 🟦🟦🟦🟦🟦🟦 🟧🟧🟧🟧🟧🟧🟧🟧 December 🟦🟦🟦🟦🟦🟦 🟧🟧 answer box
15
Hint: Count the squares in that bar, then multiply by 5, because each square stands for 5 books.