In a survey of 18 college students, it was found that 11 were taking an English class, 6 were taking a
Math class, and 4 were taking both English and math. How many students were taking a math class
Only?
A)11
B)2
C)7
D)5

Question

Quizplus · Accepted Answer

Out of the 18 students, 4 were taking both English and math, so we can subtract these from the total number taking English (11) to get 7 students taking only English. Similarly, we can subtract the 4 taking both from the total number taking math (6) to get 2 students taking only math. Therefore, the answer is 2. To find the number of students taking only math, we need to subtract the number of students taking both English and math from the total number of students taking math. 
Total number of students taking math = 6 
Number of students taking both English and math = 4 
Number of students taking only math = Total number of students taking math - Number of students taking both English and math 
Number of students taking only math = 6 - 4 = 2

In a Survey of 18 College Students, It Was Found