91影视

The different categories in the table state the counts of drivers who met a head-on collision.

A complementary event of an event E is represented by the symbol that expresses the idea that event E does not occur in the experiment.

The probability ofthe complementary event is stated below.

$P\left(\stackrel{炉}{E}\right)=1-P\left(E\right)$

Add the sum total for the rows and columns.

Define event A that a randomly selected driver was not killed in the collision.

As a result, $\stackrel{炉}{A}$ is the event that the randomly selected driver was killed in the passenger car.

The number of drivers who were not killed is 10045.

The total number of drivers is 18102.

The probability that the randomly selected driver was not killed is:

$$\begin{gathered} P\left(A\right)=\frac{10045}{18102} \\ =0.555 \end{gathered}$$

The probability that the randomly selected driver was killed is:

$$\begin{gathered} P\left(\stackrel{炉}{A}\right)=1-P\left(A\right) \\ =1-0.555 \\ =0.445 \end{gathered}$$

Thus, the complementary event has a probability of 0.445.