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%
B. 40%
C. 50%
D. 60%
E. 66 2/3%
Answer: E
请问很容易知道整船人20%又RT票和车,40%的RT票乘客有车。后面怎么得出50%?难道是相除吗? 谢谢 |