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Question

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?

5.33

5.67

6.75

128

ANSWER : 3

Descrption

<div dir = "auto" style = "font - family: 'Segoe UI Historic', 'Segoe UI', Helvetica, Arial, sans - serif; color: #050505; font - size: 15px; background - color: #f0f2f5;">Interest on 750*.08 =  60 tk</div>
<div dir = "auto" style = "font - family: 'Segoe UI Historic', 'Segoe UI', Helvetica, Arial, sans - serif; color: #050505; font - size: 15px; background - color: #f0f2f5;">Interest on 1250*.06 = 75 tk</div>
<div dir = "auto" style = "font - family: 'Segoe UI Historic', 'Segoe UI', Helvetica, Arial, sans - serif; color: #050505; font - size: 15px; background - color: #f0f2f5;">So, total interest =  135 tk</div>
<div dir = "auto" style = "font - family: 'Segoe UI Historic', 'Segoe UI', Helvetica, Arial, sans - serif; color: #050505; font - size: 15px; background - color: #f0f2f5;">And, total deposit  = 2000 tk</div>
<div dir = "auto" style = "font - family: 'Segoe UI Historic', 'Segoe UI', Helvetica, Arial, sans - serif; color: #050505; font - size: 15px; background - color: #f0f2f5;">Average interest rate = 135/2000 * 100%  =  6.75%</div>

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