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There are 10000 corporations, of which 0.2% is audited by the government, of those audited company 75% are technology company, what is the percentage of technology corporations which are audited by gov, appealed, and won the appeal?
条件1, 40% of the audited companies appealed
条件2, 65% of the appealed companies lose the appeal
好像选了C BY ivywangcool
根据题意可得:audited companies 0.2%*10,000=20,
audited technology companies 20*75%=15
条件一:只能得到audited companies appealed的数量。
条件二:不知audited companies appealed的数量,无法得到the appealed companies lose the appeal的数量因而更不能得知appealed companies won the appeal.
条件一+条件二:首先可得到audited technology companies appealed的数量15*40%=6[/color],audited technology companies won the appeal的数量6*(1-65%)近似2。最终audited by gov, appealed, and won the appeal的数量为6+2=8.
选C。狗主正解。
楼主的见解:
条件1, 40% of the audited companies appealed
应是40% * 10000 * 0.2%, 而不能15*40%=6, 这个相当于 40% of the audited technology companies appealed
所以这个题,楼主赶脚 是不是应该是E? |
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