Question

9C9= What is the answer?

Answer 1

Answer:

The answer Is 1

Step-by-step explanation:

Answer 2

Answer:

1

Step-by-step explanation:

Using the definition

n$C_{r}$ = $\frac{n!}{r!(n-r)!}$

where n! = n(n - 1)(n - 2) × 3 × 2 × 1, note that 0! = 1

Given

9$C_{9}$ = $\frac{9!}{9!(9-9)!}$ = $\frac{9!}{9!(0!)}$ = $\frac{9!}{9!}$ = 1