Question

Evaluate 19C1 PLEASE HELP

Answer 1

Answer:

Your answer will be 19C1 =19

Answer 2

Answer:

${19}C_1=19$

Step-by-step explanation:

We need to find the value of ${19}C_1$.

C stands for combination.

The formula of combination is as follows :

$nC_r=\dfrac{n!}{r!(n-r)!}$

Here,

n = 19 and r = 1

So,

$nC_r=\dfrac{19!}{1!(19-1)!}\\\\nC_r=\dfrac{19!}{1!\times 18!}\\\\nC_r=\dfrac{19\times 18!}{1!\times 18!}\\\\nC_r=19$

So, the value of ${19}C_1$ is 19.