<em>s</em>and<em>t</em>arepositiveintegerswhoseaverage(arithmeticmean)is9.If<em>s</em>&lt;<em>t</em>,whatisthemedianofallpossiblevaluesof<em>s</em>? A: 6.5 B: 6 C: 5.5 D: 5 E: 4.5

Is20theaverage(arithmeticmean)ofu,v,w,and20? A: Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient. B: Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient. C: BOTHstatementTOGETHERaresufficient,butNEITHERstatementALONEissufficient. D: EACHstatementALONEissufficient. E: Statements(1)and(2)TOGETHERareNOTsufficient.