9. Probability and Statistics - hats and glasses Suppose you sell hats for $10 each and...
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9. Probability and Statistics - hats and glasses Suppose you sell hats for $10 each and sunglasses for $5 each. You know the expected number of hats sold in a day is 10 with standard deviation 1; you know the expected number of sunglasses sold in a day is 20 with standard deviation 2; you know the sale of hats and sunglasses are independent. What is the standard deviation of your revenues in a day? (round to closest dollar) Pick ONE option 2 3 14 200 Clear Selection 9. Probability and Statistics - hats and glasses Suppose you sell hats for $10 each and sunglasses for $5 each. You know the expected number of hats sold in a day is 10 with standard deviation 1; you know the expected number of sunglasses sold in a day is 20 with standard deviation 2; you know the sale of hats and sunglasses are independent. What is the standard deviation of your revenues in a day? (round to closest dollar) Pick ONE option 2 3 14 200 Clear Selection
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