Question

the cost price of 16 articles is equal to the selling price of 12 articles. Find the gain per cent.

Answer 1

x+y=16 x +y= 15 find solution

Answer 2

LET CP OF 16 ARTICLE =X AND SP OF 12 ARTICLE =X
THEN CP OF ONE ARTICLE =X/16 AND SP OF ONE ARTICLE =X/12
NOW GAIN % = TOTAL GAIN
-------------------×100
, CP
WHICH IS= X/12-X/16
--------------×100
X/16
which is= x/48
------×100
X/16
= 1/3×100 = 100/3% GAIN