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- Sep 20th 2009, 01:51 PM #1

- Joined
- Sep 2009
- Posts
- 47

## cant be done

A boiler has five identical relief vavles. The probability that any particular vavle will open on demand is .95. Assuming independent operation of valves, caculate P(at least one vavle opens) and P(at least

one valve fails to open).

Can u help me by showing how to do this?

- Sep 20th 2009, 02:01 PM #2