※ 引述《woody3724 (woody)》之銘言：
: A table of data had 36 entries arranged in 9 rows and 4 columns. A computer
: program randomly deleted exactly one entry in each row. If the column had the
: greatest number of entries deleted, what is the least number of entries that
: could have been deleted in that column?
: (A) 2 (B) 3 (C) 4 (D) 5 (E) 6
: 我對題目的理解如下圖
: