In a survey of 350 individual investors regarding subscriptions to the New York Times (NYT), Wall Street Journal (WSJ), and USA Today (UST), the following data were obtained.
121 subscribe to the NYT.
154 subscribe to the WSJ.
68 subscribe to the UST.
39 subscribe to the NYT and WSJ.
27 subscribe to the WSJ and UST.
22 subscribe to the NYT and UST.
80 do not subscribe to any of these newspapers.

Question

In a survey of 350 individual investors regarding subscriptions to the New York Times (NYT), Wall Street Journal (WSJ), and USA Today (UST), the following data were obtained.
121 subscribe to the NYT.
154 subscribe to the WSJ.
68 subscribe to the UST.
39 subscribe to the NYT and WSJ.
27 subscribe to the WSJ and UST.
22 subscribe to the NYT and UST.
80 do not subscribe to any of these newspapers.

anonymous · Answer

(a) How many of the individual investors surveyed subscribe to all three newspapers?
investors

(b) How many subscribe to only one of these newspapers?
investors

anonymous · Answer

did you see the link i placed in your other question?

anonymous · Answer

oh no I didnt! let me go find it

anonymous · Answer

http://www.youtube.com/watch?v=LIzIhmKlYPk in case you couldn't find it.

anonymous · Answer

it's very nice explanation. It's pretty funny how i actually figured that out without even knowing about venn diagrams though.