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What proportion of machine time would be lost in operating four machines when each machine operates...

What proportion of machine time would be lost in operating four machines when each machine operates unattended 70 percent of the time and the operator attention time at irregular intervals averages 30 percent? Is this the best arrangement for minimizing the proportion of machine time lost?

Math   Statistics-And-Probability   
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Answer #1

Given that:

When each machine operates unattended 70%.

Operator attention time at irregular intervals averages 30%.

  

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