A part of certain sum of money is invested at 9% per annum and the rest at 12% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is? Pick one: A) 4:5 B) 4:2 C) 4:3 D) 4:9 E) 4:1
12:9   = 4:3   Answer:4:3
<result>C</result>
A part of certain sum of money is invested at 9% per annum and the rest at 12% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is?