问题标题：
【求助!一道GMAT数学题Ifanorganizationweretosellnticketsforatheaterproduction,thetotalrevenuefromticketsaleswouldbe20percentgreaterthanthetotalcostsoftheproduction.Iftheorganizationactuallysoldallbut5percent】
问题描述：
求助!一道GMAT数学题
Ifanorganizationweretosellnticketsforatheaterproduction,thetotalrevenuefromticketsaleswouldbe20percentgreaterthanthetotalcostsoftheproduction.Iftheorganizationactuallysoldallbut5percentofthentickets,thetotalrevenuefromticketsaleswaswhatpercentgreaterthanthetotalcostsoftheproduction?
正确答案说是14%,但不知道是怎么求出来.我以为是20%*95%=19%,不知道正确的公式应该是什么呢?
范广民回答：
一个机构要为一个Theaterproduction销售N张Tickets(n)售票总收入R=n*p（p为单价)是成本的120%,也就是R=C*120%如果只卖出95%,那么修正之后收入就是S=R*95%R=C*120%S=R*95%->R=S/(95%)S/(95%)=C*120%S/C=95%*120%=1.1...
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