Multiple Choice Questions on The average age of a class is 30 yr 5 new students with an average age of 32 yr joined in that class........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The average age of a class is 30 yr 5 new students with an average age of 32 yr joined in that class...........

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    The average age of a class is 30 yr.5 new students with an average age of 32 yr joined in that class, thereby increased the average by half year. The original strength of the class was

    15

    Correct Answer

    20

    Incorrect Answer

    18

    Incorrect Answer

    24

    Incorrect Answer
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    Explanation:

    Solution:
    Let the number of students in the class = x
    30*x +5*32 /(x+5)=30+1/2
    30x+160/(x+5)=61/2
    x=15.

    By: Pranav Gupta
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