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

                           like tacosno tacostotal
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