Question

The table below shows the number of students in a school who like tacos and/or pizza:

Like Tacos Do Not Like Tacos Total
Like Pizza 57 13 70
Do Not Like Pizza 12 15 27
Total 69 28 97

What is the relative frequency, by row, of students who like both tacos and pizza?
0.18
0.46
0.81
0.83

Answer 1

like tacos........no tacos.....total
like pizza 57 13 70
no pizza 12 15 27
----------------------------------------------------------------
total 69 28 97

relative frequency who both like tacos and pizzas = 57/70 = 0.81

Answer 2

Relative frequency, by row, of students who like both tacos and pizza is:

0.81

Explanation:

Like Tacos Do Not Like Tacos Total

Like Pizza 57 13 70

Do Not Like Pizza 12 15 27

Total 69 28 97

The relative frequency by row is calculated as the ratio of the frequency of the required field to the total frequency of that row

Hence, relative frequency, by row, of students who like both tacos and pizza is:

57/70

=0.81