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9th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    DIRECTIONS: Passage ? 1 Read the passages given below and answer the questions that follow. A group of students was given a math?s test. The test was completed by various students in the following time (in minutes): 18, 20, 21, 25. Mean time taken by the students to complete the test is

    A)  5 minutes                   

    B)  10 minutes

    C)  20 minutes                 

    D)  21 minutes

    Correct Answer: D

    Solution :

         Number of students = 4 Mean times\[=\frac{18+20+21+25}{4}=\frac{84}{4}\]                  \[=21\]minutes


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