The article "Should You Report That Fender-Bender?"† reported that 7 in 10 auto accidents involve a single vehicle. Suppose 11 accidents are randomly selected. (Round your answers to five decimal places.)

What is the probability that exactly nine involve multiple vehicles?

Using the principle of binomial probability, the probability that exactly 9 involve multiple vehicle is 0.00053

Probability of single vehicle = 7/10

Probability of multiple vehicle = 1 - (7/10) = 0.3

From the concept of binomial probability :

P(x = x) = nCx * p^x * q^(n-x)

x = 9

n = number of trials = 11

p = probability of success = 0.3

q = 1 - p = 0.7

Therefore, the probability that exactly 9 involve multiple vehicles can be defined as :

P(x = 9) = 11C9 × 0.3^9 × 0.7^2

P(x = 9) = 55 × 0.00000964467

P(x = 9) = 0.00053045685

Therefore, the probability that exactly 9 involve multiple vehicle is 0.00053

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0.19975

Step-by-step explanation:

P = nCr pʳ qⁿ⁻ʳ

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1−p).

Given:

n = 11

r = 9

p = 0.7

q = 0.3

Plugging in values:

P = ₁₁C₉ (0.7⁹) (0.3¹¹⁻⁹)

P = 0.19975

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.