You can use a factor tree to find the factorization of a number is to divide out prime numbers only. For example: Number 24
24
12 2
6 2
3 2
2 is a primer number, so thats why im dividing it by that number
Tiffany answered 32 questions correctly since 32/40 is .80
There all multiples of 9 so just times it by your Y axis
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
