Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Find the value of
n
n
n
if
n
C
2
=
45
{}^{n}C_{2}=45
n
C
2
=
45
. a)
9
9
9
b)
10
10
10
c)
7
7
7
d)
11
11
11
Browse the problem library