42. Crowding on Mooreville＊s subway frequently leads todelays, because it is diffi cult for passengers to exitfrom the trains. Subway ridership is projected toincrease by 20 percent over the next 10 years. TheMooreville Transit Authority plans to increase thenumber of daily train trips by only 5 percent over thesame period. Offi cials predict that this increase issuffi cient to ensure that the incidence of delays dueto crowding does not increase.Which of the following, if true, provides the strongestgrounds for the offi cials＊ prediction?(A) By changing maintenance schedules, the TransitAuthority can achieve the 5 percent increasein train trips without purchasing any newsubway cars.(B) The Transit Authority also plans a 5 percentincrease in the number of bus trips on routesthat connect to subways.(C) For most commuters who use the subwaysystem, there is no practical alternative publictransportation available.(D) Most of the projected increase in ridership isexpected to occur in off-peak hours when trainsare now sparsely used.(E) The 5 percent increase in the number of traintrips can be achieved without an equal increasein Transit Authority operational costs.78. A recent report determined that although only 3percent of drivers on Maryland highways equippedtheir vehicles with radar detectors, 33 percent of allvehicles ticketed for exceeding the speed limit wereequipped with them. Clearly, drivers who equip theirvehicles with radar detectors are more likely to exceedthe speed limit regularly than are drivers who do not.The conclusion drawn above depends on which of thefollowing assumptions?(A) Drivers who equip their vehicles with radardetectors are less likely to be ticketed forexceeding the speed limit than are drivers whodo not.(B) Drivers who are ticketed for exceeding thespeed limit are more likely to exceed the speedlimit regularly than are drivers who are notticketed.(C) The number of vehicles that were ticketed forexceeding the speed limit was greater than thenumber of vehicles that were equipped withradar detectors.(D) Many of the vehicles that were ticketed forexceeding the speed limit were ticketed morethan once in the time period covered by thereport.(E) Drivers on Maryland highways exceeded thespeed limit more often than did drivers on otherstate highways not covered in the report.
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发表于 2010-6-2 18:58:06
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