Using matrix multiplication, determine how to divide ` 30,000 among
the two types of bonds If the trust fund must obtain an annual total interest of:
(a)
` 1800
(b)
` 2000
Rationalised 2023-24
MATRICES         61
20 The bookshop of a particular school has 10 dozen chemistry books, 8 dozen
physics books, 10 dozen economics books Their selling prices are ` 80, ` 60 and
` 40 each respectively