Ajarcontains(装有)onlyred,green,andbluemarbles(玻璃球).Ifitisthreetimes
aslikely(可能)thatyourandomlypick(随意选择)aredmarbleasagreenmarble,and
fivetimesaslikelythatyoupickagreenoneasablueone.Whichofthe
followingcouldbethenumberofmarblesinthejar?(翻译并解答)
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