A carpenter can build a toolshed three times as fast as his apprentice. Working
1 answer:
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Answer:
The probability is
Step-by-step explanation:
From the question we are told that
The mean values is
The standard deviation is
Generally the total mean is mathematically represented as
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Generally the total variance is mathematically represented as
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Generally the total standard deviation is mathematically represented as
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Generally the probability that it takes at most 70 min of machining time to produce a randomly selected component is mathematically represented as
Here
From the z table
The area under the normal curve to the right corresponding to 1.8587 is
So
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