In a survey of 400 individual investors regarding subscriptions to the New York Times (NYT), Wall Street Journal (WSJ), and USA Today (UST), the following data were obtained.

Question

120 subscribe to the NYT.
146 subscribe to the WSJ.
68 subscribe to the UST.
36 subscribe to the NYT and WSJ.
27 subscribe to the WSJ and UST.
23 subscribe to the NYT and UST.
132 do not subscribe to any of these newspapers.
(a) How many of the individual investors surveyed subscribe to all three newspapers?

Incorrect: Your answer is incorrect.
investors

(b) How many subscribe to only one of these newspapers?
investors

Answer 1

If you made a Venn diagram, and remember how they work, then

(a) (120+146+68)-(36+27+23)+x = 400-132
(b) now use the Venn diagram to add up the three parts that don't intersect any others.