I think A) 18 is the right answer.
What’s the answer and questions
Ur ans will be bit 3
if x-k is a factor then f(k)=0
Given:
15 students
2 students must be chosen.
No repetition, no order
This is a combinations problem. We use this formula: n! / (n-r)!(r!)
n = 15 ; r = 2
15! / (15-2)!(r!) ⇒ 15! / 13! * 2! = 105
