Little Learnersplay. practice. discover.Grade 8 · Math
Choose the correct subgroup denominator when interpreting a two-way table.
6 authored questions + worked example
A two-way table records travel and hats. Walk: 18 with a hat, 12 without a hat. Bus: 8 with a hat, 12 without a hat.
Answer:
The condition selects walkers only: 30 students. Of them, 18 wear hats, so the fraction is = 3/5.
All 6 authored questions for this skill.
Question 1
A two-way table records travel and hats. Walk: 9 with a hat, 6 without a hat. Bus: 3 with a hat, 12 without a hat.
Restrict the denominator to the group after “among”; do not use the whole table.
Answer:
The condition selects walkers only: 15 students. Of them, 9 wear hats, so the fraction is = 3/5.
Question 2
A two-way table records travel and hats. Walk: 14 with a hat, 6 without a hat. Bus: 10 with a hat, 10 without a hat.
Restrict the denominator to the group after “among”; do not use the whole table.
Answer:
The condition selects walkers only: 20 students. Of them, 14 wear hats, so the fraction is = 7/10.
Question 3
A two-way table records travel and hats. Walk: 8 with a hat, 12 without a hat. Bus: 4 with a hat, 16 without a hat.
Restrict the denominator to the group after “among”; do not use the whole table.
Answer:
The condition selects walkers only: 20 students. Of them, 8 wear hats, so the fraction is = 2/5.
Question 4
A two-way table records travel and hats. Walk: 15 with a hat, 10 without a hat. Bus: 5 with a hat, 20 without a hat.
Restrict the denominator to the group after “among”; do not use the whole table.
Answer:
The condition selects walkers only: 25 students. Of them, 15 wear hats, so the fraction is = 3/5.
Question 5
A two-way table records travel and hats. Walk: 18 with a hat, 12 without a hat. Bus: 8 with a hat, 12 without a hat.
Restrict the denominator to the group after “among”; do not use the whole table.
Answer:
The condition selects walkers only: 30 students. Of them, 18 wear hats, so the fraction is = 3/5.
Question 6
A two-way table records travel and hats. Walk: 12 with a hat, 8 without a hat. Bus: 6 with a hat, 14 without a hat.
Restrict the denominator to the group after “among”; do not use the whole table.
Answer:
The condition selects walkers only: 20 students. Of them, 12 wear hats, so the fraction is = 3/5.