Calculate the proportion of the second and first group.
240 / 36 = 12 ∙ 20 / 12 ∙ 3 = 20 / 3
Multiply 9 country choice in first group by this proportion.
9 ∙ 20 / 3 = 180 / 3 = 60
A survey asked 36 students to choose their favorite type of music from the choices of rock, pop, and country. The results of the survey are given below.
• 11 rock
• 16 pop
• 9 country
Based on this information, how many students in a class of 240 students would be expected to choose country as their favorite type of music?
A) 40
B) 60
C) 80
D) 90
Please help!!!
1 answer