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工作学习 / English / 问一道gmat题，还望高手解答1. An insurance company has a paper record and an electronic record for every claim. For an inaccurate paper record, 60% chances that the electronic record is inaccurate. For an inaccurate electronic record, 75% chances that the paper record is inaccurate. 3% of all the claims are inaccurate both in paper record and in electronic record. Pick one claim randomly, what are the chances that it is both accurate in paper record and in electronic record?
A.97% B.94% C.68% D.65% E.35%
-lilyba(Sunshine);
2002-12-20
{484}
(#925784@0)
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B
-pasu(InTheSky);
2002-12-20
(#925800@0)
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B1) quick guess, no need to calculate,
the solution is not simple, A C D absolutely wrong
2) solution: 3/0.6=5 3/0.75=4
100-(5+4-3)=94
If I were ETS, I would made the choices 97,96,95,94
-fff(非狒飞);
2002-12-20
{195}
(#925802@0)
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B
-diao_david(大卫。刁);
2002-12-20
(#925810@0)
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谢谢楼上诸位，我先消化一下。
-lilyba(Sunshine);
2002-12-20
(#925813@0)