question_answer29) A trust fund has Rs.30,000 that must be invested in two different types of bonds. The first bond pays 5% interest per year, and the second bond pays 7% interest per year. Using matrix multiplication, determine how to divide Rs.30,000 among the two types of bonds., if the truest fund must obtain an annual total interest of : (a) Rs.1800 (b) Rs.2000View Answer play_arrow
question_answer30) The bookshop of a particular school has 10 dozen chemistry books, 8 dozen physics books. 10 dozen economics books. Their selling prices are Rs. 80 Rs.60 and Rs.40 each respectively. Find the total amount the bookshop will receive from selling all the books using matrix algebra.View Answer play_arrow
question_answer72) A manufacturer produces three products x, y, z which he sells in two markets. Annual sales are indicated below : Market Products I 10,000 2,000 18,000 II 6,000 20,000 8,000 (a) If unit sale prices of x, y and z are Rs.2.50, Re.1.50 and Re.1.00, respectively, find the total revenue in each market with the help of matrix algebra. (b) If the unit costs of the above three commodities are Re.2.00, Re.1.00 and 50 paise respectively, find the gross profit.View Answer play_arrow
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