Respuesta :
Answer:
The correct option is B.
Step-by-step explanation:
Total number of students = 15
Number of selected students = 2
Total number of ways to select r items from n items is
[tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]
Total number of ways to select 2 items from 15 items is
[tex]^{15}C_{2}=\frac{15!}{2!(15-2)!}=105[/tex]
[tex]^{15}C_{2}=\frac{15\times 14\times 13!}{2\times 1\times 13!}=105[/tex]
Therefore the correct option is B.
