ALGEBRA
posted by MONICA .
From a survey of 100 college students, a marketing research company found that 65 students owned iPhones, 40 owned cars, and 30 owned both cars and iPhones.
(a) How many students owned either a car or an iPhone (but not both)?

65/100 had iPhones of those 6530 had car too so 35 only had iPhone
40/100 had cars of those 4030 had iPhone too so 10 only had car
35 + 10 = 45 only had iPhone OR car 
From a survey of 100 college students, a marketing research company found that 65 students owned iPods, 45 owned cars, and 25 owned both cars and iPods.
(a) How many students owned either a car or an iPod (but not both)?
students
(b) How many students do not own either a car or an iPod?
students 
From a survey of 100 college students, a marketing research company found that 50 students owned iPods, 30 owned cars, and 20 owned both cars and iPods.

From a survey of 100 college students, a marketing research company found that 65 students owned iPods, 35 owned cars, and 25 owned both cars and iPods.
(a) How many students owned either a car or an iPod (but not both)? 
6525=40, 3525=10, 40+10=50.

50

40+10+50