作者chilis (庞克新生报到^_^)
看板GMAT
标题[计量] GWD31-15回Q3
时间Fri Oct 3 01:22:02 2008
这题我跟朋友都解不出来~希望有点可以指点迷津^^"
GWD31-15回
Q35:
For what percent of those tested for a certain infection was the test accurate;
that is, positive for those who had the infection and negative for those who
did not have the infection?
(1) Of those who tested positive for the infection, did not have the
infection.
(2) Of those tested for the infection, 90 percent tested negative.
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Answer: E
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