Two-way tables

You can use a two-way table to show two sets of information.

Exercise in two-way tables

Aled carried out a survey to see how many of his classmates are left-handed. His results are shown in the table below:

This is an example of a two-way table and it is used to show two different features in a survey.

In this case it shows:

• boys and girls
• left-handed or right-handed

You can find out lots of information from this table. For example, you can see that there are $${2}$$ left-handed boys in the class. You can also see that there are $${13}$$ girls in the class ($${1}$$ left-handed and $${12}$$ right-handed).

Question

Q1. How many right-handed children are there in the class?

Q2. How many children are there in total?

A1. There are $${14}$$ right-handed boys and $${12}$$ right-handed girls, so $$14 + 12 = 26$$ in total.

A2. There are $${29}$$ children in total.

This is the total of all the numbers in the table.