【已刪除】5. For this consumer, the optimal basket to buy would be
(A) (x,y) = (9,3)
(B) (x,y) = (3,1)
(C) (x,y) = (1,3)
(D) (x,y) = (3,9)
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統計: 尚無統計資料
統計: 尚無統計資料