Sat_数学考试试题(10)

Sat 数学历年真题

Students Studying Both=3 iii

What are we looking for? Percentage of butterfly students only.

What is the percentage? We have to find it. This is a two-stepper. First, find the total number of students:

B + G + B and G + Other = Total 9 + 15 + 3 + 3 = 30