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?
Select the correct option.
A) 6400
B) 6500
C) 7200
D) 7500
E) 7800
Explanation :   Let the investment in scheme A be Rs.x   and the investment in scheme B be Rs.(13900 - x)   We know that SI = PRT/100   Simple Interest for Rs.x in 2 years at 14% p.a. = x×14×2/100=28x/100   Simple Interest for Rs.(13900 - x) in 2 years at 11% p.a. = (13900−x)×11×2/100   =22(13900−x)/100   Total interest = Rs.3508   28x/100+22(13900−x)/100=3508   28x+305800−22x=350800   6x=45000   x=45000/6= 
<gadget id="calculator">45000/6</gadget>
<output>7_500</output>
7500   Investment in scheme B= 13900 - 7500 = Rs.6400   6400nswer : Option 6400
<result>A</result>
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?