a) 13/27
b) 13/27
c) 1/3
d) 1/2
• 同意你的答案(a)和 (b)-- 13/27 -Blue_Diamond- ♂ (820 bytes) () 02/08/2011 postreply 18:18:51
• b)13/27 顯然太大. -jinjing- ♀ (0 bytes) () 02/08/2011 postreply 19:13:49
• 我也不希望如此。可是, -Blue_Diamond- ♂ (56 bytes) () 02/08/2011 postreply 20:24:00
• 2)27/196,有1/2一男一女,1/4二男,1/4二女. -jinjing- ♀ (126 bytes) () 02/09/2011 postreply 12:28:01
• 再說答案你的(d) -Blue_Diamond- ♂ (3317 bytes) () 02/08/2011 postreply 19:36:10
• 關於你的題目(c)的前半部的答案: -Blue_Diamond- ♂ (2134 bytes) () 02/08/2011 postreply 19:48:00
• 關於你的題目(c)的疑問之一: -Blue_Diamond- ♂ (2271 bytes) () 02/08/2011 postreply 20:18:21
• 問得好 -wushuihe- ♂ (280 bytes) () 02/09/2011 postreply 01:59:43
• 改進後的問題(c)-- 就按家長任選一個孩子來回答 -Blue_Diamond- ♂ (6602 bytes) () 02/09/2011 postreply 20:24:52
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy