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9th Class Mathematics Statistics Question Bank Statistics

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    DIRECTIONS (Qs. 4 - 7): Given below is a bar graph showing the heights of six mountain peaks.     Read the above diagram and answer the following:  

    When the heights of the given peaks are written in ascending order, then what is the average of the middle two peaks?

    A) 7950m                        

    B) 7560m

    C) 7650m                        

    D) 7850m

    Correct Answer: D

    Solution :

    The ascending order of heights is, 6000 m < 6500 m < 7500 m < 8200 m < 8600 m < 8800 m. The two middle peaks are 7500 m, 8200 m. Average \[=\frac{7500+8200}{2}\] \[=\frac{15700}{2}=7850m.\]


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