Answer
Answer: 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} = 3508.
28x/100 + (13900*22)-(x*22)/100 = 3508.
28x/100 + 305800-22x/100 = 3508.
28x+305800-22x/100 = 3508.
Now,
28x+305800-22x=3508*100.
28x-22x=350800-305800.
6x=45000.
x=45000/6.
x=7500.
So, sum invested in Scheme B = Rs. (13900 - 7500) = Rs. 6400.