A part of certain sum of money is invested at 6% 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?  Options.
A) 4:6	B) 4:9	C) 4:3	D) 5:2	E) 4:2
15:6   = 5:2   Answer: 5:2
<result>D</result>
A part of certain sum of money is invested at 6% 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?