轉學考-離散數學題庫下載題庫

 (1) If k is the least numbers of integers must be selected from {1，3, 5,…，29} to make sure there is at least o： pair of these integers with the sum 26, then k is
(A) 6-8
(B)9〜11
(C) 12〜14
(D) 14〜16
(E) none of above.