Exploring Two-Way Tables and Probability

The video tutorial explains how to interpret and use two-way tables in probability questions. It covers calculating the number of boys and girls, swimmers and non-swimmers, and determining probabilities. The tutorial also includes a second example using weight categories to further illustrate the use of two-way tables.

How many boys are there in the class?

• 21

• 24

• 29

• 50

What is the total number of students in the class?

• 29

• 21

• 75

• 50

What is the probability of randomly selecting a girl from the class?

• 29/50

• 26/50

• 21/50

• 24/50

How many students are either boys or swimmers?

• 50

• 24

• 21

• 34

How many heavy boys are there?

• 12

• 21

• 29

• 33

What is the total number of heavy students?

• 29

• 12

• 80

• 41

How many light girls are there?

• 29

• 12

• 21

• 18

What is the probability of randomly selecting a girl?

• 47/80

• 33/80

• 59/80

• 21/80

What is the probability of randomly selecting a light boy?

• 21/80

• 12/80

• 29/80

• 18/80

What is the probability of selecting a girl or a heavy student?

• 59/80

• 47/80

• 41/80

• 29/80