Question

answer me fast , if you answered my question I make him brain list

Answer 1

i think option 3 is right

Answer 2

Let CP OF 1 ARTICLE= RS.1

THEN CP OF 12 ARTICLES= 12

AND SP OF 12 ARTICLES= 09

GAIN= SP-CP= 12-9=3

GAIN%= (GAIN/CP)*100 %

=(3/12)*100

=25%