The table above shows the cancellation fee schedule that a travel agency uses to determine the fee charged to a tourist who cancels a trip prior to departure. If a tourist canceled a trip with a package price of$1,700 and a departure date of September 4, on what day was the trip canceled ?()
(1)The cancellation fee was $595.
(2)If the trip had been canceled one day later, the cancellation fee would have been $255 more.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
参考答案:C
解析:
(1)不充分,因为当撤消费用为595美元时,占代办费的比例为[*],根据表格中的数据可知此旅行在31~45天前被取消,但无法得知确切的撤消日期;(2)不充分,因为根据(2)可知晚一天多付的钱占总代办费的[*],结合表格中的数据,不难发现撤消的时间存在两种可能,即出发前的31天,或出发前的16天;而根据(1)+(2)可得撤消旅行的日期必为出发前的第31天,即8月4日。