Ames divides rp 150,000,000 out over 3 bank accounts; bank a,b and c. bank account a earns 5% annual interest while bank account b earns 7% annual interest. at the end of the year, james receives rp 2,275,000 interest from bank a, rp 4,900,000 from bank b. unfortunately, james lost the bank details of bank c, and only has the information of his balance after receiving the interest, which is currently at rp. 35,535,000. what is the interest rate of bank c?

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Ames divides rp 150,000,000 out over 3 bank accounts; bank a,b and c. bank account a earns 5% annual interest while bank account b earns 7% annual interest. at the end of the year, james receives rp 2,275,000 interest from bank a, rp 4,900,000 from bank b. unfortunately, james lost the bank details of bank c, and only has the information of his balance after receiving the interest, which is currently at rp. 35,535,000. what is the interest rate of bank c?

the : account : of : bank : a \ frac{100}{5} times 2.275.000 = 45.500.000 \ \ the : account : of : bank : b \ frac{100}{7} times 4.900.000 = 70.000.000 \ \ the : account : of : bank : c \ 150.000 .000- (45.500.000 + 70.000.000) \ 150.000.000 - 115.500.000 \ 34.500.000 \ \ the : interest : rate : of : bank : c \ frac{35.535.000 - 34.500.000}{34.500.000} times 100% \ \ frac{1.035.000}{34.500.000} times 100% \ \ 3%