Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-conditional-probability-933-en_uva-conditional-probability-933-en
    nameuva-conditional-probability-933-en
    sectionProbability/Elementary Probability/Conditional probability
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty0.524
    p-value0.9051

    Question

    Suppose a class contains 40 students. Of these, 3 students are left-handed. The teacher wants to randomly select two students, each of whom must answer a question. What is then the probability that the teacher will choose the second choose a left-handed student, given that the first student is also left-handed is left-handed?


    1. FALSE: 3/40
    2. TRUE: 2/39
    3. FALSE: 2/43
    4. FALSE: 6/1560

    1. 3/40: Incorrect
    2. 2/39: Correct
    3. 2/43: Incorrect
    4. 6/1560: Incorrect