Twelve students are applying for two summer internships. How many different ways can these two positions be filled? O 66 40 O 86 O 132
Mathematics · High School · Sun Jan 24 2021
llm
Answered on
Formula:
nCr = n!/r!(n-r)!
We have,
n = 12
r = 2
So,
12C2 = 12!/2!(12-2)!
= 12 × 11 × 10!/2 × 10!
= 66
Hence, two positions can be filled in 66 different ways.