[計量] 想請問各位一種題型

看板GRE作者 (USC)時間16年前 (2010/02/08 09:59), 編輯推噓1(101)
留言2則, 1人參與, 最新討論串1/3 (看更多)
1.the probability of getteing an 8 as a sum when a pair of fair dice tossed 和 1/6 比大小。 2.when the odds are against the occurence of a certain event, it can be found by computing the ratio of the probability of nonocurrence to the occurence. the odds against getteing an 7 as a sum when a pair of fair dice tossed 和 6 比大小。 ------------------------------------ 順便一問, 我想請問這種題型, 到底 假設和為7 3+4 和 4+3 到底算兩組還是一組呢? ^^ thanks -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.138.31.201

02/08 10:12, , 1F
這要看你用排列還是組合計算,排列跟排列比,組合跟
02/08 10:12, 1F

02/08 10:13, , 2F
組合比,幾組的問題在算機率時會被消去。
02/08 10:13, 2F
文章代碼(AID): #1BRs_pRC (GRE)
文章代碼(AID): #1BRs_pRC (GRE)