Question: Hi, I need help solving this problem. 20. The incomes of trainees at a local mill are normally distributed with a mean of $1 100

Hi, I need help solving this problem.

20. The incomes of trainees at a local mill are normally distributed with a mean of $1 100 and a standard deviation of $150. What percentage of trainees earn less than $900 per month? % Earning less than $900

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