Problem: If the margin made on an article costing C dollars and selling for S dollars is M=n1C, then the margin is given by:
Answer Choices:
A. M=n−11S
B. M=n1S
C. M=n+1nS
D. M=n+11S
E. M=n−1nS
Solution:
S=C+n1C;∴C=n+1nS;∴M=n1C=n1⋅n+1nS=n+1S