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  1. #1
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    Post 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?
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  2. #2
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    Quote Originally Posted by arslan View Post
    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).
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  3. #3
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    Quote Originally Posted by mr fantastic View Post
    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.
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  4. #4
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    Quote Originally Posted by arslan View Post
    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)
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