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ml-recall

#sum-of-random-variables

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Question 1: Short answer

mediumAI-checkedProbability

Every day a person buys a coffee and a muffin at a coffee shop chosen at random, independently of other days. The coffee costs on average $1.40 with standard deviation $0.30; the muffin costs on average $2.50 with standard deviation $0.15; the two prices are independent. What is the standard deviation of the total amount spent on breakfast over 7 days, in dollars?

dollars, 2 or 3 decimals