[計量] 請教一題數學
If 55 percent of a group of people have brown hair and 80 percent
of the same group do not have red hair, what fraction of those who
do not have brown hair have red hair?
ans:4/9
不知道是我看不懂題目還是答案有錯
我怎麼看感覺答案都是5/9
(選項有 1/4 4/11 4/9 5/9 4/5)
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.22.208
討論串 (同標題文章)
GRE 近期熱門文章
PTT職涯區 即時熱門文章
-9
12