※ 引述《chasethesky (堅持!)》之銘言：
: A researcher plans to identify each participant in a certain medical
: experiment with a code consisting of either a single letter or a pair of
: distinct letters written in alphbetical order. What is the least number of
: letters that can be used if there are 12 participants, and each participant
: is to receive a different code?
: A 4
: B 5
: C 6
: D 7
: E 8
: 答案 B
: 請各位指教，謝謝^^
測試者可用單一字母或兩個字母標示，要多少字母才可區分12個測試者
X + C X 取 2 > 12
X 最小必須為 5
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 218.167.100.186