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9th Class Mathematics Probability Question Bank Probability

  • question_answer
    A summery was conducted on a group of students on their IQ score. The data recorded are given below. On the basis of given data the possibility of a student selected randomly whose IQ 100 and more is
    IQ score 80-90 90-100 100-110 110-120 120-130
    No. of students 6 9 16 13 4

    A)  0.6                              

    B)  0.5  

    C)  0.8                              

    D)  0.9

    Correct Answer: B

    Solution :

    (b): Number of students whose score is 100 and more = 25 Total students = 50 \[n\left( p \right)=\frac{25}{50}=\frac{1}{2}=0.5\]          


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