1. A test consists of 3 true-and-false questions . Jack answers the questions randomly. With the help of a tree diagram , find the probability that
(a) all answers are correct
(b) the first answer is correct and the last one is wrong
(c) at least one answer is correct.
Maths
2008-08-08 2:01 am
回答 (1)
2008-08-08 2:26 am
✔ 最佳答案
Explanation as follows:圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths360.jpg?t=1218104773
參考: My Maths Knowledge
收錄日期: 2021-04-24 08:28:45
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