Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-addition-rule-1108-en_uva-addition-rule-1108-en
    nameuva-addition-rule-1108-en
    sectionProbability/Elementary Probability/General Rules/Addition rule
    typeschoice
    solutionFALSE, FALSE, TRUE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty1.382
    p-value0.8716

    Question

    In recent US elections, 55% of all voters voted Republican and 45% did not. Of the Republicans, 80% vote for candidate X, and of the non-Republicans, 10% vote for candidate X. Take one random voter in the US and define the event B as: Vote for the candidate X. Then what is the probability of P(B)?


    1. FALSE: 0,045
    2. FALSE: 0,440
    3. TRUE: 0,485
    4. FALSE: 0,550

    1. 0.045: Incorrect
    2. 0.440: Incorrect
    3. 0.485: Correct
    4. 0.550: Incorrect