Math Help - probabilty question

1. probabilty question

Find the probability of the outcome described.

A car insurance company has determined that 9% of all drivers were involved in a car accident last year. If 11 drivers are randomly selected, what is the probability that at least 3 were involved in a car accident last year?

2. Originally Posted by arslan
Find the probability of the outcome described.

A car insurance company has determined that 9% of all drivers were involved in a car accident last year. If 11 drivers are randomly selected, what is the probability that at least 3 were involved in a car accident last year?
Let X be the random variable number of accidents.

X ~ Binomial(n = 11, p = 0.09).

Calculate $Pr(X \geq 3) = 1 - \Pr(X \leq 2)$.

3. Originally Posted by mr fantastic
Let X be the random variable number of accidents.

X ~ Binomial(n = 11, p = 0.09).

Calculate $Pr(X \geq 3) = 1 - \Pr(X \leq 2)$.
how tho? sorry im bit new to this.

4. Originally Posted by arslan
how tho? sorry im bit new to this.
Have you got class notes or a textbook? If so, then look up the formula for the binomial distribution. Or you can read this: Binomial Distribution (1 of 3)