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    Probability in a class and normal distributions

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    A class consist of 10 males and 30 females. If one student is randomly selected from the class what is the probability of selecting a male?
    - 1/40
    - 1/10
    - 10/30
    - 10/40

    A class consist of 10 males and 30 females. a random sample of n=3 is selected. If the first two students are both females what is the probability that the third student is a male?

    What proportion of a normal distribution is located in the tail beyond z= 1.50?

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    P (selecting a male) = Favorable no. of cases/Total no. of cases


    Solution Summary

    The solution provides step by step method for the calculation of probabilities and normal distributions.