Problem Solving

[Problem Solving] 试题详情

A total of n trucks and cars are parked in a lot. If the number of cars is  the number of trucks, and  of the trucks are pickups, how many pickups, in terms of n, are parked in the lot?

Options:

n
n
n
n
n

Correct:

D

Problem Solving

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[点此查看答疑][GWD]Problem Solving

麻烦老师解释一下e为什么不选? Transportation expenses accounted for a large portion of the tota丨 dollar amount spent on trips for pleasure by residents of the United States in 1997, and about half of the total dollar amount spent on transportation was for airfare. However, the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation. If the statements above are true, which of the following must also be true about United States residents who took trips for pleasure in 1997 ? A Most of those who traveled by airplane did so because the airfare to their destination waslower than the cost of other available means of transportation. B Most of those who traveled by airplane did so because other means of transportation to their destination were unavailable. C Per mile traveled, those who traveled by airplane tended to spend more on transportation to their destination than did those who used other means of transportation. D Overall, people who did not travel by airplane had lower average transportation expenses than people who did. E Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare.
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[点此查看答疑][GWD]Problem Solving

麻烦老师解释一下e为什么不选? Transportation expenses accounted for a large portion of the tota丨 dollar amount spent on trips for pleasure by residents of the United States in 1997, and about half of the total dollar amount spent on transportation was for airfare. However, the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation. If the statements above are true, which of the following must also be true about United States residents who took trips for pleasure in 1997 ? A Most of those who traveled by airplane did so because the airfare to their destination waslower than the cost of other available means of transportation. B Most of those who traveled by airplane did so because other means of transportation to their destination were unavailable. C Per mile traveled, those who traveled by airplane tended to spend more on transportation to their destination than did those who used other means of transportation. D Overall, people who did not travel by airplane had lower average transportation expenses than people who did. E Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare.

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