There are 6 cards marked with numbers 1, 3, 4, 5, 7,8 respectively in a bag. Two cards are now drawn at random from the bag one by one without replacement. Find the probability of each of the following events.
1) At least one of the cards drawn is marked with an even number.
2) One card drawn is marked with an even number and the other card is marked with an odd number.
Probability
2010-11-20 1:21 am
回答 (2)
2010-11-20 4:39 am
✔ 最佳答案
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2010-11-19 20:39:48 補充：
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2010-11-20 1:48 am
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https://hk.answers.yahoo.com/question/index?qid=20101119000051KK00803