Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-multiplication-rule-664-en_uva-multiplication-rule-664-en
    nameuva-multiplication-rule-664-en
    sectionProbability/Elementary Probability/General Rules/Multiplication rule
    typeschoice
    solutionFALSE, FALSE, FALSE, TRUE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2
    p-value0.5905

    Question

    A first vase contains two white and three black balls, a second vase contains three white and one black. If you randomly choose one of the two vases and you draw a little ball from it, what is the probability that this ball is black?


    1. FALSE: 2/4
    2. FALSE: 1/4
    3. FALSE: 4/9
    4. TRUE: 17/40

    1. 2/4: Incorrect
    2. 1/4: Incorrect
    3. 4/9: Incorrect
    4. 17/40: Correct