1. Handling Data
Two-Way Tables

2. Can you… If not you need Fill in a two-way table
Answer questions from a two-way table
Find probabilities from a two-way table
Try a test
TOP: Review adding and subtracting
Practice 1: Completing two-way tables
Practice 2: Reading information from two-way tables
Practice 3: Finding probabilities from two-way tables
TAIL
If not you need

3. TOP
15 – 9
86 – 32
200 – 75
837 – 387
192 – 123
Answers 79 6 51 54
196
125
176
450
156 69
Are you ready for the answers ?
Lesson

4. Hiking Canoeing Climbing Total Under 15’s 42 150 15 – 30 30 47 100
Practice 1: Complete the following tables
1) Students are asked if they prefer to go swimming or to the gym.
2) Some people are asked about their favorite outdoor sport.
Swimming
Gym
Total
Boys 25 45
Girls 64
100 20 55 39 16 36
Hiking
Canoeing
Climbing
Total
Under 15’s 42
150
15 – 30 30 47
100
Over 30 15 75
300 40 68 23 5 50 95
130
Lesson

5. New Chips Mash Total Boys 34 100 Girls 25 37 Teachers 12 22 50 104 250
Practice 2: Copy and complete the following two-way table about
ways of eating potato and then answer the questions.
How many boys liked mash?
How many teachers preferred new potatoes?
How many girls were asked?
Out of the people who liked chips, how many were boys?
New
Chips
Mash
Total
Boys 34
100
Girls 25 37
Teachers 12 22 50
104
250 15 51 38
100 16 52 94 34 12
100 51
Lesson

6. Practice 3: For the following two-way table answer the questions on probability. A person is picked at random from the sample.
New
Chips
Mash
Total
Boys 15 51 34
100
Girls 25 37 38
Teachers 12 16 22 50 52
104 94
250
What is the probability the person picked is a boy?
What is the probability the person liked mash?
What is the probability the person was a teacher who preferred new potatoes?
What is the probability that, out of the girls, the person liked chips?
Out of the people who liked chips, what is the probability the person was a boy?
Desired outcomes
100
All possible outcomes
250 94
250 52
250 37
100 51
Lesson
104

7. TAIL
For the following table, copy and complete it, then answer the questions
about types of coffee bought.
Coffee is sold in three types and in three weights.
How many people bought 100g of powdered coffee?
How many people bought ground coffee?
Out of the packets weighing 200g, what is the probability the packet bought contained granules?
100g
200g
300g
Total
Ground 50
120
Powder 80 35 26
Granules 40 45
135
400
100g
200g
300g
Total
Ground
 15 50
55 
120
Powder 80 35 26
141 
Granules 40 45 54
 139
135
130 
400
(a) 80
(b) 120
(c) 45/130
Are you ready for the answers ?
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