Find lines experiences a surface finish problem

Reference no: EM13143473

The time between surface finish problems in galvanizing process is exponentially distributed with a mean of 40 hours. A single plant operates three galvanizing lines that are assumed to operate independently.

a. What is the probability that none of the lines experiences a surface finish problem in 40 hours of operation.
b. What is the probability that all three lines experience a surface finish problem between 20 and 40 hours of operation.

Reference no: EM13143473

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