a bag contains balls of three colours, red, blue and yellow. if a ball is drawn at random from the bag, the probabilities of getting a ball of various colours are shown below:
not red: 3/5
not blue:3/4
find the probability of getting a ball which is not yellow.
12. two dice are thrown. find the probability of getting each of the following results.
c) the first dice or the second dice shown the number 6.
f5 probability
2007-10-21 6:22 am
回答 (1)
2007-10-21 7:58 am
✔ 最佳答案
probabilitiy of getting a ball of red = 1- 3/5 = 2/5probabilitiy of getting a ball of blue = 1- 3/4 = 1/4
probabilitiy of getting a ball of yellow = 1- 2/5 -1/4 = (20-8-5)/20 = 7/20
12c)
probabilitiy of the first dice or the second dice shown the number 6 = 1/6
參考: me
收錄日期: 2021-04-11 20:30:58
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https://hk.answers.yahoo.com/question/index?qid=20071020000051KK05311