On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 60 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?
A. 33 1/3%
E. 66 2/3%
R NR T
T x 100
20+.6x=x --> 20=.4x --> 10/4*20=x x=50
Sorry my double set matrix probably won't look right on the post...