某高可靠性计算机系统由图6-1所示的冗余部件构成，若每个部件的千小时可靠度为0.95，则该系统的千小时可靠度R为()。
- A.0.9999
- B.0.9975
- C.0.9475
- D.0.8574
正确答案及解析
正确答案
解析
系统可靠性计算，这是串并联混合系统，每个R可靠性是0.95，总可靠性是 0.95*（1-（1-0.95）^3）（1-（1-0.95）^2）=0.9475.本题计算有个小技巧，这种复杂的计算先不要硬算，看下相乘的结果，肯定是小于0.95的，也不能太离谱。
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