Forty-five percent of the time sales are above 671000


Total annual textbook sales in a certain discipline are normally distributed.

Forty-five percent of the time, sales are above 671,000 copies, and 10% of the time, sales are above 712,000 copies. Find the mean and the variance of annual sales.

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Basic Statistics: Forty-five percent of the time sales are above 671000
Reference No:- TGS02168543

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