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Marked out of 1.00 Flag question The daily demand for a group of Petrol stations has mean 99000L with standard deviation 10000L . What is

Marked out of 1.00 Flag question The daily demand for a group of Petrol stations has mean 99000L with standard deviation 10000L . What is the z-score on a day when the demand is 81000 O a. 13.20 O b. -1.80 O c. -3.80 O d. 6.50

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