If the mean time to failure of an instrument is 100,000 hours, calculate the probability that it will not fail in the first 50,000 hours. Four measurement components connected in series have the...

If the mean time to failure of an instrument is 100,000 hours, calculate the probability that it will not fail in the first 50,000 hours.

Four measurement components connected in series have the following reliabilities:

0.98 0.93 0.95 0.99. Calculate the reliability of the whole measurement system.