# SOLUTION: A mail order house uses an average of 300 mailbags per day. The number of bags needed each day is normally distributed with standard dev. = 50. How many bags must the company hav

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 Click here to see ALL problems on Probability-and-statistics Question 383492: A mail order house uses an average of 300 mailbags per day. The number of bags needed each day is normally distributed with standard dev. = 50. How many bags must the company have on hand at the beginning of a day to be 99% certain all orders can be filled? Answer by robertb(4012)   (Show Source): You can put this solution on YOUR website! implies that z = 2.325, approximately. Then . They would need 417 bags to be 99% certain all orders can be filled.