Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-conditional-probability-954-en_uva-conditional-probability-954-en
    nameuva-conditional-probability-954-en
    sectionProbability/Elementary Probability/Conditional probability
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty-2.248
    p-value0.9629

    Question

    In a statistics class there are 40 students. Each time, the teacher chooses one student at random to answer three questions (without backtracking). Marja is relieved because the first two questions are answered by her classmates. What is now the probability for Marja to have to answer the third question have to answer?


    1. FALSE: 1/50
    2. TRUE: 1/38
    3. FALSE: 3/50
    4. FALSE: 1/3

    1. 1/50: Incorrect
    2. 1/38: Correct
    3. 3/50: Incorrect
    4. 1/3: Incorrect