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1. A total of Tk 1200 is deposited in two savings accounts for one year, part at 5% and the remainder at 7% interest rate. If Tk 72 was earned in interest, how much was deposited at 5%?
- A. Tk 300
- B. Tk 300
- C. Tk 300
- D. Tk 300
Answer: Option C
Explanation:
Let, Tk was deposited at 5%
so, (1200 - x) was at 7%
Total interest = 72 = . 5 × x + ( 1200 - x) ×. 07
= . 05x + 84 - . 07x
x (. 05 - . 07) = 72 - 84
x × ( - .02) = - 12
x = 12/.02 = 600
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