[求助] 两个同类的数学题，希望大家帮忙解答下

zxj191401

Q18:

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%

Q33:

In Town X, 64 percent of the population are employed, and 48 percent of the population are employed males.  What percent of the employed people in Town X are females?

 

A.     16%

B.     25%

C.     32%

D.    40%

E.     52%

sysxy1987

第一题，passengers with round-trip tickets did not take their cars abroad the ship是60%那么就是说passengers with round-trip tickets take their cars abroad the ship是40%，而这40%占了20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship，那么就是20%/40%=50%

第二题，48/64得到男人的比率是75%，那么女人的比率就是25%

zxj191401

谢谢啦