Rajesh invested Rs. 10,000 by dividing it into two different investment schemes, A and B, at simple interest rates of 8% and 10%, respectively. If the total interest earned in 2 years is Rs. 1,680, the amount invested in scheme A is:
1
Rs. 8,000
2
Rs. 2,000
3
Rs. 6,000
4
Rs. 4,000