The monthly incomes 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 $900 a month?   a. 40.82%   b. 35.31%   c. 90.82%   d. 9.12%

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The monthly incomes 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 $900 a month?

  a.

40.82%

  b.

35.31%

  c.

90.82%

  d.

9.12%

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