prep里关于失业率那道题。。。。

self346959851

57.(34655-!-item-!-188;#058&007580)

Roland:The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed.

Sharon:But a normal, moderate level of unemployment is 5 percent, with 1 out of 20 workers unemployed.So at any given time if a person knows approximately 50 workers, 1 or more will very likely be unemployed.

Sharon's argument is structured to lead to which of the following as a conclusion?

(A) The fact that 90% of the people know someone who is unemployed is not an indication that unemployment is abnormally high.

这个结论是怎么得出来的呀？

sdcar2010

Sharon's reply is based on the assumption that Roland is citing the right statistical data. And Sharon thinks that it not unusual to find some of your acquaintance unemployed when the unemployment rate is 5%.