In a survey of college students, each of the following was found. Of these students, 355 owned a tablet, 292 owned a laptop, 280 owned a gaming system, 191 owned a
tablet and a laptop. 198 owned a tablet and a gaming system, 136 owned a laptop and a gaming system, 66 owned a tablet, a laptop, and a gaming system, and 24
owned none of these devices. Complete parts a) through e) below.
a) How many college students were surveyed?
(Simplify your answer.)