摘要: (1)设步步高超市调查了名顾客.则依题意得: .解得,·············································································· 2分 (2)购买帆布袋的顾客数所占比例为. 所以圆心角的度数为,······································································ 4分 (3)购买尼龙袋的顾客数为. ····················································· 6分 (4)答案不唯一.例如:步步高订购三种环保型袋子的比例为. 8分

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