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DISTRIBUTION OF CUSTOMER COMPLAINTS RECEIVED BY AIRLINE P, 2003 AND 2004 (a)Approximately how many complaints concerning credi
DISTRIBUTION OF CUSTOMER COMPLAINTS RECEIVED BY AIRLINE P, 2003 AND 2004 (a)Approximately how many complaints concerning credi
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2018-12-14
27
问题
DISTRIBUTION OF CUSTOMER COMPLAINTS
RECEIVED BY AIRLINE P, 2003 AND 2004
(a)Approximately how many complaints concerning credit were received by Airline P in 2003?
(b)By approximately what percent did the total number of complaints decrease from 2003 to 2004?
(c)Based on the information in the table, which of the following statements are true?
I. In each of the years 2003 and 2004, complaints about flight problems, baggage, and customer service together accounted for more than 50 percent of all customer complaints received by Airline P.
II. The number of special passenger accommodation complaints was unchanged from 2003 to 2004.
III. From 2003 to 2004, the number of flight problem complaints increased by more than 2 percent.
选项
答案
230 42 percent I
解析
(a)According to the table, in 2003,1 percent of the total number of complaints concerned credit. Therefore, the number of complaints concerning credit is equal to 1 percent of 22,998. By converting 1 percent to its decimal equivalent, you obtain that the number of complaints in 2003 is equal to(0.01)(22,998), or about 230.
(b)The decrease in the total number of complaints from 2003 to 2004 was 22,998 - 13,278, or 9,720. Therefore, the percent decrease was(
)(100%), or approximately 42 percent.
(c)Since 20.0 + 18.3 + 13.1 and 22.1 + 21.8 + 11.3 are both greater than 50, statement I is true. For statement II, the percent of special passenger accommodation complaints did remain the same from 2003 to 2004, but the number of such complaints decreased because the total number of complaints decreased. Thus, statement II is false. For statement III, the percents shown in the table for flight problems do in fact increase by more than 2 percentage points, but the bases of the percents are different. The total number of complaints in 2004 was much lower than the total number of complaints in 2003, and clearly 20 percent of 22,998 is greater than 22.1 percent of 13,278. So, the number of flight problem complaints actually decreased from 2003 to 2004, and statement III is false.
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