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The income of trainees at a local mill are normally distributed with a mean of $1100...

The income of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation of $150. What percentage of trainees earn less than $1200 a month?

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Answer #1

Consider, X=The income of trainees at a local mill

P[X<1200]

=P[Z<0.67]

=0.7486

Therefore, 74.86% of trainees earn less than $1200 a month

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