Question

200 students were asked to name their favorite science class. The results are shown in the two-wayfrequency table. Use the table to answer the following question.

Answer 1

Explanation:

We're told from the question that 200 students took part in the exercise, so if the total number of girls is 100 then the total number of boys will be;

$\text{Total number of boys =}200-100=100$$\text{Total number of boys that chose Biology}=100-44-37=19$$\text{Total number of boys and girls that chose Biology}=40+19=59$$\text{Total number of boys and girls that chose Chemistry}=39+44=83$$\text{Total number of boys and girls that chose Physics}=21+37=58$$\text{Total of the total row}=59+83+58=200$

To find how many more girls than boys chose Biology, we'll have;

$40-19=21$

So 21 more girls than boys chose Biology.