Question

A man purchased some oranges at 3 for 15rupies and sold then 4 for 24 rupies. He gained 120 rupies in the whole transaction. How many oranges dud he purchased.

Answer 1

HEYA!!

YOUR SOLUTION IS IN THE ATTACHMENT.

#KEVIN

HOPE IT HELPS YOU ☺

Answer 2

cp=3 for 15 so cp of one orange is 5 rupees
sp=4 for 24 rupees so one orange is 6 rupees 

gain one rupees of selling one orange

he gained 120 rupees in whole transaction so he would bought 120 oranges 

so answer will be  -120 oranges