Delhi Police Constable 7 Dec 2020 Shift 2 Paper

Question : 86 of 100

Marks: +1, -0

A student purchased a box of pens at the rate of 8 pens for Rs. 24 and sold all of them at the rate of 9 pens for Rs. 45. In this transaction, he gained Rs. 240. How many pens did the box contain?