Question

the conditional relative frequency table was generated using data that compares the number of boys and girls who pack their lunch or buy lunch from the cafeteria. 35 total girls and 50 total boys were surveyed. how many students bought their lunch from the cafeteria? round to the nearest whole number.

	cafeteria	pack	total
girls	0.4	0.6	1.0
total	0.42	0.58	1.0

Explanation:

Step1: Calculate number of boys who buy from cafeteria

Multiply total boys by boys' cafeteria - buying frequency. So, $50\times0.44 = 22$.

Step2: Calculate number of girls who buy from cafeteria

Multiply total girls by girls' cafeteria - buying frequency. So, $35\times0.4=14$.

Step3: Calculate total number of students who buy from cafeteria

Add number of boys and girls who buy from cafeteria. $22 + 14=36$.

Answer:

36