關(guān)于GMAT數(shù)學(xué)題的問題
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?
在一次橫渡大西洋中,20%的乘客有round-trip然后帶著他們的車上船.如果60%的乘客有round-trip沒有帶車上船,問：有多少百分比的乘客有round-trip?
a.33.3333333%b.40%c.50%d.60% e.66.6666666666666%
機(jī)經(jīng)上的一道題~~~做不來
Freiheit1218提到：持有往返票（round-trip）并帶著車的占總乘客數(shù)的20%；所有持有往返票的乘客中，沒帶車的占60%。
那么也就是說：持有往返票并帶著車的乘客占總乘客數(shù)的（1-60%）
也就是說題目其實(shí)在問實(shí)際乘船人數(shù)和理論乘船人數(shù)的百分比是伐?。?/div>