Answer:
Let Money invested in
the first type of bond =Rs.x
Money invested
in the second type of bond
=Rs. (30000 ? x)
row matrix A
= |x 30000 ? x| represens
Investment and a
column matrix
= [1800]
5x + 210000 ?
7x = 180000
2x = 30000 x = 15000.
Investment in
first type of bond is Rs.15000 and that in the second type of bond is
Rs.(30,000 ? 15,000) = Rs.15,000.
(b) Total annual
interest is given by product
AB = [x 30,000 ?
x]
= [2000]
5x + 2,10,000
? 7x = 2,00,000
2x = 10,000 x = 5000.
Investmentin
first type of bond is Rs.5000 and that in the second type of bond is Rs.(30,000
? 5,000) = Rs.25,000).
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