[解題]看不懂的考古題
each of the integers from 0 to 9,inclusive, is written on a separate slip of
blank paper and the ten slips are dropped into a hat.If the slips are then
drawn one at a time without replacement,how many must be drawn to ensure that
the numbers on two of the slips drawn will have a sum of ten?
a.3
b.4
c.5
d.6
e.7
答案是e~
我看了好多遍都看不懂～
可以請厲害的版友們幫我解題嗎？
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.222.66
推
04/06 16:45, , 1F
04/06 16:45, 1F
推
04/06 17:21, , 2F
04/06 17:21, 2F
討論串 (同標題文章)
GMAT 近期熱門文章
PTT職涯區 即時熱門文章
