A part of certain sum of money is invested at 9% per annum and the rest at 15% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is?	Choose the most appropriate option:
A) 4:2
B) 4:8
C) 5:3
D) 4:0
E) 4:9
15:9   = 5:3   Answer: 5:3
<result>C</result>
A part of certain sum of money is invested at 9% per annum and the rest at 15% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is?