Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-multiplication-rule-935-en_uva-multiplication-rule-935-en
    nameuva-multiplication-rule-935-en
    sectionProbability/Elementary Probability/General Rules/Multiplication rule
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty-0.697
    p-value0.9428

    Question

    Suppose a class contains 40 students. 15% of them are left-handed. 50% of them prefer to write with a pencil. Do we define the event A: the left-handed students of this class and the event B: the students who use a pencil. We assume that A and B are independent of each other. What is the probability if the teacher chooses one student at random, that he or she is a left-hander and also wants to use a pencil use?


    1. TRUE: 0,075
    2. FALSE: 0,150
    3. FALSE: 0,500
    4. FALSE: 0,650

    1. 0.075: Correct
    2. 0.150: Incorrect
    3. 0.500: Incorrect
    4. 0,650: Incorrect