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Middle Years

12.04 Two-way tables

Interactive practice questions

$50$50 students were asked whether or not they were allergic to nuts and dairy. The two way table is provided below.

  Allergic to Nuts Not Allergic to Nuts
Allergic to Dairy $6$6 $11$11
Not Allergic to Dairy $6$6 $27$27
a

How many students are allergic to nuts?

b

How many students are allergic to nuts or dairy, or both?

c

How many students are allergic to at most one of the two things?

Easy
Approx 3 minutes
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Some students were asked if they are left or right handed. The results are provided in the table to the right.

If a student is picked from this group at random,

Mr. Tobit asked the students in his class to pick their favourite subject. He displayed the results in a two-way table.

$170$170 tennis players were asked whether they would support equal prize money for the women’s and men’s draw.

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