Q1、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% Q2、A
certain roller coaster has 3 cars, and a passenger is equally likely to ride in
any 1 of the 3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride the
roller coaster 3 times, what is the probability that the passenger will ride in
each of the 3 cars?
A.
0 B.
1/9 C.
2/9 D.
1/3 E.
1 请不要鄙视问题太弱，n年没碰过数学了啊，对不住大家啊！麻烦高手解答下！谢谢！
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发表于 2008-8-12 22:49:00
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