The probability that in a single shot Peter hits a target is 1/4 and the probability that John hits the same target is 1/3. If each person shoots twice, what is the probability that the target will be hit exactly twice?
answers:37/144 pls.
收錄日期: 2021-04-12 19:52:20
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https://hk.answers.yahoo.com/question/index?qid=20070602000051KK03533