Question

In a survey, adults and children were asked whether they prefer hamburgers or pizza. The survey data are shown in the relative frequency table.
About 60% of adults prefer pizza.

Compare this with the percentage of children who prefer pizza.

Hamburgers Pizza Total
Adults 0.24 0.36 0.60
Children 0.11 0.29 0.40
Total 0.35 0.65 1.00

Select the true statement.

A. A smaller percentage of children (43%) prefer pizza.
B. A smaller percentage of children (30%) prefer pizza.
C. A greater percentage of children (about 70%) prefer pizza.
D. A greater percentage of children (64%) prefer pizza.

Answer 1

The 60% of adults who like pizza was found by dividing the adults who like pizza ( 0.36) by the total adults ( 0.60): 0.36 / 0.6 = 0.6 = 60%

To find the percent of children that like pizza divide 0.29 by 0.40:

0.29 / 0.40 = 0.725 = 72.5%, which is about 70%

The answer would be C. A greater percentage of children (about 70%) prefer pizza.