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Explanation:
Focus on the first row only. We won't worry about the other stocks.
Convert each of the percentages to decimal form
Then multiply those decimal values with their respective gains or losses.
Use a negative sign to indicate losses.
The last step is to add up each of the results to get the expected value.
-10+0.75+20.25 = 11
The result is positive, so it's a gain rather than a loss.
On average, we expect an $11 gain for stock ABC.
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Side note: Thank you for making the screenshot much more clear.
