這題的probability 點計嫁?
2011-10-20 6:47 am
The probability that a company will obtain contract A is 0.7, contract B is 0.35 and contract C is 0.22. If contract A, contract B and contract C are independent, what is the probability that the company will obtain (a) No contract?(b) Only 1 contract?
回答 (1)
2011-10-20 7:27 am
✔ 最佳答案
(a) P(No contract)= (1 - 0.7)(1 - 0.35)(1 - 0.22)= 0.1521(b) P( Only 1 contract)= 0.7(1 - 0.35)(1 - 0.22) + (1 - 0.7)0.35(1 - 0.22) + (1 - 0.7)(1 - 0.35)0.22= 0.4797
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