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.

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2022-06-11 问题

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.