Question: Help please I need answer as soon as possible. Thank you A study revealed that a group of three semiautomatic machines assigned to one operator

Help please I need answer as soon as possible. Thank you

A study revealed that a group of three semiautomatic machines assigned to one operator operate 70 percent of the time unattended. Operator service time at irregular intervals averaged 30 percent of the time on these three machines. What is the machine hour lost if 1 machine is down?

A. 1.512

B. 0.432

C. 0.532

D. 0

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