Question

1. X: the number of automobile accidents per year in Virginia.

Answer 1

The question is incomplete, assume it as:

Let the total number of accidents in Virginia are 3500.

And X: the number of automobile accidents per year in Virginia, $n(X)=2800$

and Y: the number of other accidents per year in Virginia.

What is the probability of an accident which is not automobile?

Solution:

$n(S)=3500 \\n(X)=2800 \\ n(Y)=3500-2800=700 \\ P(Y)=\dfrac{n(Y)}{n(S)}=\dfrac{700}{3500}=\dfrac15$