优质解答 The mixture is 1 - 1/5 = 4/5 of the cup,containing equal amounts of orange,grapefruit,and pineapple juices,so in this part,each juice is (4/5)*(1/3) = 4/15 of the cup; orange juice is 4/15 + 1/5 = 7/1... 作业帮用户 2017-10-16 举报 其他类似问题 One order...