The amount of Rs. 18000 is partially lent at 7% and the remaining amount at 9% per annum. If the average annual interest is 8.5%, then at 9% the amount given (in Rs.) is:

The amount of Rs. 18000 is partially lent at 7% and the remaining amou

1.	The amount of Rs. 18000 is partially lent at 7% and the remaining amount at 9% per annum. If the average annual interest is 8.5%, then at 9% the amount given (in Rs.) is:
A.	Rs. 10500
B.	Rs. 4500
C.	Rs. 13500
D.	Rs. 7500
Answer» D. Rs. 7500