Re: [計量] GWD 2-Q18
R: held round-trip tickets
nR: held no round-trip tickets
C: bring cars
nC: bring no cars
P: total passengers
| R | nR |
---|--------|-----|---
C | 0.2*P | |
---|--------|-----|---
nC | 0.6*R | |
---|--------|-----|---
| R | | P
Question: R / P = ?
Ans: 0.2*P + 0.6*R = R
solving the equation, you will get the ans.
hth
※ 引述《creamz (creamz)》之銘言：
: 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%
: Ans: C
--
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◆ From: 118.168.172.71
※ 編輯: xerophily 來自: 118.168.172.71 (11/05 23:55)
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