Question

Mr x has invested a part of his investment in bond a which gives 10% return and part in bond b which gives 15% return. His interest income during risk year is rs 4000. If he invests 20%more in bond a and 10% more in bond b, his income increases by rs 500. Find his initial investment and new investment in bonds a and b, using matrix method.

Answer 1

,Mr x has invested a part of his investment in bond a which gives 10% return and part in bond b which gives 15% return. His interest income during risk year is rs 4000. If he invests 20%more in bond a and 10% more in bond b, his income increases by rs 500. his initial investment and new investment in bonds a and b, using matrix method is rs 236000