Mary invested $800, part at 9% per annum and the rest at 12% per annum. After 1 year, the total inte

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Mary invested $800, part at 9% per annum and the rest at 12% per annum. After 1 year, the total interest earned was $79.50. How much did she invest at each rate?

Using our split fund calculator, we get:

• Fund 1: $550
• Fund 2: $250