in a drawer,
there are 2 white shirts and 2 grey shirts.
if 2 shirts is drawn at random from the drawer,
what is the probability that
a) Both shirts are white?
b) one shirt is white and the other is grey?
急... F.3 Maths
2007-06-17 12:37 am
回答 (2)
2007-06-17 12:58 am
✔ 最佳答案
a) P(both shirts are white) = 1/2 x 1/2= 1/4
b) ∴P(one shirt is white) = 1/2
P(one shirt is grey) = 1/2
∵P(one shirt is white and the other is grey) = 1/2 x 1/2
= 1/4
參考: me``
2007-06-17 1:14 am
a)1/4
b)2/1
b)2/1
收錄日期: 2021-04-13 00:59:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070616000051KK03032