Mr. Thomas invested an amount of Rs. 13,900 divided in two different schemes A and B at the simple interest rate of 14% p.a. and 11% p.a. respectively. If the total amount of simple interest earned in 2 years be Rs. 3508, what was the amount invested in scheme B?
Options:
A .  Rs. 6400
B .  Rs. 6500
C .  Rs. 7200
D .  Rs. 7500
Answer: Option A
Let the sum invested in scheme A be Rs. x and that in scheme B be Rs. (13900 - x). Then,(x * 14 * 2)/100 + [(13900 - x) * 11 * 2]/100 = 350828x - 22x = 350800 - (13900 * 22)6x = 45000 => x = 7500So, sum invested in scheme B = (13900 - 7500) = Rs. 6400.
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