9514 1404 393
Answer:
120
Step-by-step explanation:
The function C(n, k) can be written in terms of factorials:
C(n, k) = n!/(k!(n -k)!)
Then ...
C(16, 2) = 16!//(2!(16 -2)!) = (16·15)/(2·1)
C(16, 2) = 120
