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Mathematics, 27.08.2021 03:10 agelafa

Mary invest R2000 at a bank with a interest rate of 5% p. a. . 3 years later Mary adds R7000 to her investment. When she adds R7000 to her investment, the interest rate changes to 15% p. a. What is the total interest earned on her investment if she takes out all the money from the investment 2 years later after the addition of R7000. ​

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