SAT数学练习13VIP专享

1. Astoreholidaysalehasanitemmarkeddownby$10withanadditionaldiscountof25%ofthenewprice.Ifthefinalpricewas$36.27,whatwastheoriginal?A. $19.70B. $48.36C. $58.36D. $61.932. Aschoolhas63%girlsand37\%37%boys.If23%ofthegirlswearscontactsand42%oftheboyswearscontacts,whatpercentofallstudentswearscontacts?A.14.5%B.15.5%C.30.0%D.75.0%3. AllegraandSimeonweresellingcontainersofcookiedoughforacharityevent.Inthefirstweek,Allegrasold30%morethanSimeondid.Thefollowingweek,Allegrasold12containersofcookiedough,whileSimeonsoldnone.IfAllegrasold40%morecontainersthanSimeondidoverall,howmanydidSimeonsellintotal?Sampleanswerslist:aninteger,like6asimplifiedfractionnumber,like3/5asimplifiedimproperfraction,like7/4anexactdecimal,like0.75Correctanswer:1204. Inacommunityserviceclassinthefall,3ofthe15classsessionswerelectures,whileallothersweredevotedtofieldworkinparks.Inthespring,thenumberofsessionsdevotedtofieldworkremainedthesame,butthetotalnumberofsessionsincreasedto18.Whatpercentofclasssessionswerelecturesinthespring?A.16.7%LEVEL3B.33.3%C.66.7%D.83.3%5. OnMonday,afruitvendorbought80piecesoffruittosellathermarket,35%ofwhichwereapplesandtherestofwhichwereoranges.OnTuesday,thevendorboughtthesamenumberoforanges,butsheonlybought73piecesoffruit.OnTuesday,whatpercentageofthefruitsheboughtwasapples?A.28.8%B.38.3%C.65.0%D.71.2%6. Astudentanswered86problemscorrectly,whichwas81.9%ofthetotalnumberofproblemsonthetest.Howmanyproblemsdidthestudentanswerincorrectly?A.4B. 19C. 86D. 1057. FabrizziowentshoppingonTuesdayanddecidedtopurchaseapairofpantsthatis15%offtheregularpricefortherestoftheweek.IfhebuysthepantsonTuesday,hewillreceiveanadditional5%off.WhatpercentwouldTuesday'ssalepricebeoftheoriginalpriceforthepants?A. 81%B. 85%C. 95%D.105%8. Inacollegephilosophyclassduringthefallsemester,therewere323students,42%ofwhomweremaleandtherestofwhomwerefemale.Inthespringsemester,thesamenumberoffemaleswasintheclassasinthefall,buttherewereonly298totalstudentsintheclass.Inthespring,whatpercentofst...