Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
n
C
2
=
120
{}^{n}C_{2}=120
n
C
2
=
120
, determine the value of
n
n
n
. a)
15
15
15
b)
16
16
16
c)
12
12
12
d)
17
17
17
Browse the problem library