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

Pens purchased by Raju in Rs 150 = 10 pens Cost of 1 pen = \(\frac{150}{10} = Rs 15 \)
Pens purchased by Manish in Rs 84 = 7 pens
Cost of 1 pen = \(\frac{84}{7} \)
\(\therefore \) Pens purchased by Manish are cheaper than Raju