X bought 40 pencils for a total of Rs 180 and bought 2 dozens of pens for Rs 180. Find the difference between the price of one pen and one pencil.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Rs 3
Given that
X bought 40 pencils for a total of Rs 180 and bought 2 dozens of pens for Rs 180
CP of a pencil = 180/40 = 9/2 = 4.5 Rs
CP of a pen = 180/24 = 15/2 = 7.5 Rs
Hence, the difference between the price of one pen and one pencil = 7.5 - 4.5 = 3 Rs