SOLUTION: Amy invested in three companies: 1300 dollars for Apple, 1800 dollars for Google and 1900 dollars for Starbucks. Over the course of one year, she found that Apple went down 2 perce

Question 1184106: Amy invested in three companies: 1300 dollars for Apple, 1800 dollars for Google and 1900 dollars for Starbucks. Over the course of one year, she found that Apple went down 2 percent, Google went up 3 percent and Starbucks went up 1 percent. What is the average change in her portfolio?
Answer by ikleyn(52821)   (Show Source): You can put this solution on YOUR website!
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Amy invested in three companies: 1300 dollars for Apple, 1800 dollars for Google and 1900 dollars for Starbucks.
Over the course of one year, she found that Apple went down 2 percent, Google went up 3 percent and Starbucks
went up 1 percent. What is the average change in her portfolio?
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As the question is worded, it has a few sense (if any) without a proper definition of the notion "average change".

Much more meaningful is the question

        What is the overall change in her portfolio ?

And the answer to this fixed question is

        overall change = -0.02*1300 + 0.03*1800 + 0.01*1900 dollars.

You can make your calc.

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