[計量] 請教大家一題計量

看板GRE (GRE入學考試)作者 (加油)時間16年前 (2010/06/02 01:02), 編輯推噓4(403)
留言7則, 4人參與, 最新討論串1/1
最近在寫Q作業 有一題不會 麻煩大家幫我看一下 感謝 X={1,3,5,7} Y={2,4,6,8} Sixteen pairs of numbers will be formed by pairing each member of X with each member of Y. A pair will be chosen at random. A:The probability that the sum of the pair of numbers will be even B:The probability that the sum of the pair of numbers will be odd 答案是B -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.64.148.113

06/02 01:05, , 1F
奇 + 偶 = 奇,A = 0,B = 1,B 大
06/02 01:05, 1F

06/02 01:06, , 2F
奇 + 偶 還是 奇 故 B > A
06/02 01:06, 2F

06/02 01:32, , 3F
請問pair配對一定是相加嗎? 可以看配成12 14 16 18
06/02 01:32, 3F

06/02 01:33, , 4F
or 21 23 25之類的? 熊熊看題目我也不確定是要加還是
06/02 01:33, 4F

06/02 01:33, , 5F
寫成兩位數..
06/02 01:33, 5F

06/02 02:00, , 6F
題目是問 sum
06/02 02:00, 6F

06/02 13:13, , 7F
謝謝大家的講解 原來是我誤會題目意思了...
06/02 13:13, 7F
文章代碼(AID): #1C1Jqaca (GRE)
文章代碼(AID): #1C1Jqaca (GRE)