Probability of choosing a number from $\text{1 through 9 is}\frac{1}{9}.\text{Find the missing number from}$ the given table.

The correct option is D 90
$\text{P(Event)}=\frac{\text{Number of times the event occurs}}{\text{Total number of trails}}$

Here,

$\text{P(Number 1)}=\frac{\text{Number of people choosing number 1}}{\text{Total number of people}}$

$=\frac{1}{9}$

$\Rightarrow \frac{810}{?}=\frac{9}{1}$

Cross multiplying the numbers we get:

$\Rightarrow \text{?}=\frac{810}{9}=90$

$\Rightarrow ?=90$

∴ Value of "?" is 90.