Problem: If the margin made on an article costing C dollars and selling for S dollars is M=n1​C, then the margin is given by:
Answer Choices:
A. M=n−11​S
B. M=n1​S
C. M=n+1n​S
D. M=n+11​S
E. M=n−1n​S
Solution:
S=C+n1​C;∴C=n+1n​S;∴M=n1​C=n1​⋅n+1n​S=n+1S​