i first calculate the probability a<=b,
(6+5/6+4/6+3/6+2/6+1/6)* 1/6 = 21/36
so it is same probablity for b<=c, c<=d
so (21/36) *(21/36)*(21/36) or (21/36)^3 is the answer
where is wrong?
i first calculate the probability a<=b,
(6+5/6+4/6+3/6+2/6+1/6)* 1/6 = 21/36
so it is same probablity for b<=c, c<=d
so (21/36) *(21/36)*(21/36) or (21/36)^3 is the answer
where is wrong?
•
因为这三个事件不是独立的。a《b就会影响b《c的选择。
-sweetptt-
♂
(0 bytes)
()
12/29/2012 postreply
10:05:58
•
thanks
-smallking-
♂
(0 bytes)
()
12/29/2012 postreply
10:13:25
•
Sorry for posting the problem
-392-
♂
(28 bytes)
()
12/29/2012 postreply
10:16:42
•
以后10年教儿子们,不能教错吧,:)
-smallking-
♂
(32 bytes)
()
12/29/2012 postreply
10:19:33
•
以后10年教儿子们? 你这么年轻?
-392-
♂
(32 bytes)
()
12/29/2012 postreply
10:22:08
•
帮我,捞一个
-smallking-
♂
(25 bytes)
()
12/29/2012 postreply
13:45:40
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