Raju purchases 10 pens for Rs. 150 and Manish buys 7 pens Rs. 84. Can you say who got the pens cheaper ?

Raju purchases 10 pens for Rs150 and Manish buys 7 pens for Rs 84. Can you say who got the pens cheaper?

Raj purchases 10 pens for Rs.150 and Rajesh buys 6 for Rs. 84. Who got the cheapest pens?

A store sells boxes of 6 pens for Rs. 30 each and boxes of 12 pens for Rs. 48 each. The price per pen is what per cent less, when purchased in a box of 12 than in a box of 6?

If 15 pens cost Rs. 35, what is the cost of 39 pens?

Gaurav purchases 3 pens, 2 bags and 1 instrument box and pays Rs. 41. From the same shop Dheeraj purchases 2 pens, 1 bag and 2 instrument boxes and pays Rs. 29, while Ankur purchases 3 pens, 2 bags and 2 instrument boxes and pays Rs. 46. Translate the problem into a system of equations. Solve the system of equations by matrix method and hence find the cost of 1 pen, 1 bag and 1 instrument box.

The cost of 1 pen is Rs. 16 and the cost of 1 pencil is Rs. 5. What is the total cost of x pens and y pencils.

The cost of 3 pens is Rs. 30, then the cost of 2 pens is Rs. 20.

Cost of a dozen red pens is Rs. 108 and cost of 9 black pens is Rs.54. Find the ratio of cost of a red pen to the cost of a black pen.