Rashid spent Rs.35.75 for Maths book and Rs.32.60 for science book.Find the total amount spent by Rashid.

Radhika's mother gave her Rs 10.50 and her father gave her Rs.15.80,find the total amount given to Radhika by the parents.

The book shop of a particular school has 10 dozen Chemistry books, 8 dozen Physics books, 10 dozen Economics books. The selling prices are Rs 80, Rs 60 and Rs 40 each respectively. Find rhe total amount the book-shop will receive from selling all the books, using matrix algebra.

Sohan bought a second hand refrigerator for Rs.2500,then spent Rs. 500 on its repairs and sold it for Rs. 3300 .Find his loss or gain percent .

In a development plan of a city, a contractor has taken a contract to construct certain houses for which he needs building materials like stones, sand etc. There are three firms A, B, C that can supply him these materials. At one time these firms A, B, C supplied him 40, 35 and 25 truck loads of stones and 10, 5 and 8 truck load of sand respectively. If the cost of one truckload of stone and sand are Rs 1200 and 500 respectively, then find the total amount paid by the contractor to each of these firms A, B, C separately.

Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method : A lending library has a fixed charge for the first three days and an additional charge for each day there after. Saritha paid Rs 27 for a book kept for seven days, while Susy paid ’ Rs 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.

Sohan bought a second hand refrigerator for Rs 2,500, then spent Rs 500 on its repairs and sold it for Rs 3,300. Find his loss or gain per cent.