请教牛牛~ 求详解~

scholar

On a certainday, nine scheduled flights on Swift Airlines were canceled. Ordinarily, acancellation is due to mechanical problems with the airplane scheduled for acertain flight. However, since it is unlikely that Swift would have themechanical problems with more than one or two scheduled flights on a singleday, some of the nine cancellations were probably due to something else. Key A

(A) More than oneor two airplanes were scheduled for the nine canceled flights.
(B) Swift Airlineshas fewer mechanical problems than do other airlines of the same size.
(C) Each of thecanceled flights would have been longer than the average flight on SwiftAirlines.
(D) Swift Airlineshad never before canceled more than one or two scheduled flights on a singleday.
(E) All of the airplanesscheduled for the canceled flights are based at the same airport.




29. The price of afull-fare coach ticket from Toronto to Dallas on BreezewayAirlines is the same today as it was a year ago, if inflation is taken intoaccount by calculating prices in constant dollars. However, today 90 percent ofthe Toronto-to-Dallas coach tickets that Breezeway sells are discount tickets andonly 10 percent are full-fare tickets, whereas a year ago half were discounttickets and half were full-fare tickets. Therefore, on average, people pay lesstoday in constant dollars for a Breezeway Toronto-to-Dallas coach ticket thanthey did a year ago. Key B

Which one of thefollowing, if assumed, would allow the conclusion above to be properly drawn?
(A) A Toronto-to-Dallasfull-fare coach ticket on Breezeway Airlines provides ticket-holders with alower level of service today than such a ticket provided a year ago.
(B) A Toronto-to-Dallasdiscount coach ticket on Breezeway Airlines costs about the same in constantdollars as they did a year ago.
(C) All full-farecoach tickets on Breezeway Airlines cost the same in constant dollars as theydid a year ago.
(D) The averagenumber of coach passengers per flight that Breezeway Airlines carries from Toronto to Dallastoday is higher than the average number per flight a year ago.
(E) The criteria thatBreezeway Airlines uses for permitting passengers to buy discount coach ticketson the Toronto-to-Dallasroute are different today than they were a year ago.

cdwayne

The 1st question has been discussed a lot before, please search the forum.
(Hint: scheduled flights and planes are different.)


And the 2nd one, if last year the discount was 90% off and this year is 5% off, is the argument still reasonable?
(Hint: the number of discounted tickets and the discount are different.)