There are four independently working machines in a hall, which do not fail in a certain...

There are four independently working machines in a hall, which do not fail in a certain period of time with the probabilities 0.9, 0.95, 0.8 or 0.85.
You calculate the probability of that in that period
a) all four machines are working b) no machine is working
c) exactly one machine works d) exactly two machines work
e) exactly three machines are working f) at least one machine is working!

Expert Solution

orchestra answered 2 years ago

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