Of 410 consumers polled, some purchases music on CDs, some only download music, and some do both. If 290 people polled purchase CDs, and 220 purchase CDs and download music, how many people download music?
a. 340***
b. 120
c. 70
d. 220
220 = both
290 -220 = 70 = CD only
410 - 70 = download = 340
A :3
all but the 70 who downloaded CD only
That is 340