If a deposit of Tk.750 earns simple interest @ 8% per annum and that of Tk. 1250 earns the same @6% per annum, what is the average rate of interest (in %) earned on the total deposit?

If a deposit of Tk.750 earns simple interest @ 8% per annum and that of Tk. 1250 earns the same @6% per annum, what is the average rate of interest (in %) earned on the total deposit? Correct Answer 6.75

Interest on 750*.08 = 60 tk Interest on 1250*.06 = 75 tk So, total interest = 135 tk And, total deposit = 2000 tk Average interest rate = 135/2000 * 100% = 6.75%
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