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Railways Sample Paper RRB (Assistant Loco Pilot) Sample Test Paper-11

  • question_answer
    The average height of 8 students is 152 cm. Two more students of heights 144 cm and 155 cm join the group. What is the new average height?

    A)  \[151.5\,cm\]             

    B)  \[152.5\,cm\]              

    C)  \[151cm\]             

    D)        \[150.5cm\]

    Correct Answer: A

    Solution :

    Total height of 8 students \[~=8\times 152\text{ }cm=1216\text{ }cm\] Total height of 10 students \[=1216\text{ }cm+144\text{ }cm+155\text{ }cm=1515\,cm\]new average \[=\frac{1515}{10}cm=151.5\,cm\]


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