The true discount on a sum of money due 2 years hence at 5% is 15. Find the sum.

True discount $=frac{ ext { Amount } imes mathrm{R} imes mathrm{T}}{100+(mathrm{R} imes mathrm{T})}$

$Rightarrow 15=frac{mathrm{A} imes 5 imes 2}{100+10}$

$Rightarrow mathrm{A}=11 imes 15=mathrm{Rs} .165$