Raju purchases 10 pens for Rs. 150 and Manish buys 7 pens for Rs. 84. Can you say who got the pens cheaper?
It is given in the question,
Raju purchased 10 pens for Rs. 150
Therefore,
Price of 1 pen = 
= Rs. 15
It is also given that,
Manish purchased 7 pens for Rs. 84
Therefore,
Price of 1 pen = 
= Rs. 12
Hence, Manish got the pens in cheaper rate
13