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: Calcular número de chicos que compran

Multiplicamos el total de chicos (50) por la frecuencia relativa de chicos que compran en la cafetería (0.44). $50\times0.44 = 22$.

Step2: Calcular número de chicas que compran

Multiplicamos el total de chicas (35) por la frecuencia relativa de chicas que compran en la cafetería (0.4). $35\times0.4=14$.

Step3: Calcular total de estudiantes que compran

Sumamos el número de chicos y chicas que compran. $22 + 14=36$.

Answer:

36