Question

Evaluate 19C1 PLEASE HELP

Answer 1

Your answer will be 19C1 =19

Answer 2

`{19}C_1=19`

Explanation:

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

C stands for combination.

The formula of combination is as follows :

`nC_r=(n!)/(r!(n-r)!)`

Here,

n = 19 and r = 1

So,

`nC_r=(19!)/(1!(19-1)!)\\\\nC_r=(19!)/(1!* 18!)\\\\nC_r=(19* 18!)/(1!* 18!)\\\\nC_r=19`

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