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題目:Suppose that a certain software product has a mean time    beteween failures of 10,000 hours and has a mean time to    repair of 20 hours. If the product is used by 100 customers,    what is ites availability? 1)80.2% 2)90.1% 3)98.9% 4)99.8% 5)100% 我在網路上也找不到算法~麻煩各位了~感溫~~ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 116.118.148.81