Question

Ramen sells 2 wrist watches for rupees 1200 each on Monday on what he gains 20% and on another he loses 20% what are the cost prices of each and what is the total gain or loss percentage

Answer 1

let cost price of one is x and second watch is y rs
x+y =1200
again in first watch he gains 20%
sp= 120% of x
or sp =6x/5
in second watch he loses 20%
sp = 80% of y
or sp = 4y/5= 4 (1200-x)/5
total sp = 4800-4x+6x/5=(4800+2x)/5
total cp =1200
.....this is one of the processes
but I think some data are missing herw

Answer 2

he will sold 1st watch of ₨1200 on 20% profit. That's formula was follow
[Product price multiply hundred divided by total loss + hundred or total profit- hundred]
So, here we get from formula.
He will earn 1500₨ and when he sold 2nd watch on loss of 20% into 1200.
So, now he get from formula =₨1000.
On total sale he will earn 100₨ gains that's came from (total profit - total loss).
=300-200
=100₨