2gmat数学练习题gwd部分math.pdf

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MathSectionQ1:Ifkisnegative,whichofthefollowingmustalsobenegative?A.(-k)2B.(-1)kC.1-kD.k+1E.k-1Answer:Q2:OnSaturdaymorning,Malachiwillbeginacamvacationandhewillreturnhomeattheendofthefirstdayonwhichitrains.Ifonthefirstthreedaysofthevacationtheprobabilityofrainoneachdayis0.2,whatistheprobabilitythatMalachiwillreturnhomeattheendofthedayonthefollowingMonday?A.0.008B.0.128C.0.488D.0.512E.0.640Answer:Q3:Eachofthe45boxesonshelfJweighslessthaneachofthe44boxesonshelfK.Whatisthemedianweightofthe89boxesontheseshelves?(1)TheheaviestboxonshelfJweighs15pounds.(2)ThelightestboxonshelfKweighs20pounds.A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.1C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissuffic

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