[計量] 機率問題

看板GRE (GRE入學考試)作者 (蚊子)時間15年前 (2010/10/29 18:38), 編輯推噓5(502)
留言7則, 5人參與, 最新討論串1/1
比較大小題型。 1. Column A) Two unbiased dice are thrown. Find the probability of obtaining an even number on one and a prime number on the other. Column B) Two unbiased dice are thrown. Find the probability of obtaining an even number on both the dice. 我算的結果是A,但是答案是B, 請問答案出錯了嗎? 2. Column A) Three unbiased dice are thrown. Find the probability of obtaining an even number on one and 5 on the other two. Column B) Three unbiased dice are thrown. Find the probability of obtaining a total of 6. 我算出來兩個都是9/216,也就是答案是C。 但是正確解答是B... -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.37.136.47 ※ 編輯: leetzuwen 來自: 114.37.136.47 (10/29 18:41)

10/29 18:41, , 1F
是A:1/2 B:1/4嗎?
10/29 18:41, 1F

10/29 18:48, , 2F
2.B 應為10/216
10/29 18:48, 2F

10/29 18:55, , 3F
我算1.A:17/36 B:9/36 2.9/216 9/216
10/29 18:55, 3F

10/29 18:56, , 4F
也是錯的 有沒有強者可以解答?
10/29 18:56, 4F

10/29 19:22, , 5F
2. B是10/216
10/29 19:22, 5F

10/29 19:31, , 6F
可否請上面算第一題的列算式呢?
10/29 19:31, 6F

10/30 00:41, , 7F
第一題我覺得是答案錯了 因為差滿多的@@
10/30 00:41, 7F
文章代碼(AID): #1CogGrLP (GRE)
文章代碼(AID): #1CogGrLP (GRE)