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The average age of 20 boys in a class is 12 years. 5 new boys are admitted to class whose average age is 7 years. The average age of all boys in class becomes:


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The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is :

The average age of 20 boys in a class is 12 years. 5 new boys are admitted to class whose average age is 7 years. The average age of all boys in class becomes:

The frequency distribution data is given below. If the average age is 17 years, the value of m is<br> <table class="table-style-1"> <tr> <td>Age (in years) : </td> <td>8</td> <td>20</td> <td>26</td> <td>29</td> </tr> <tr> <td>No. of people : </td> <td>3</td> <td>2</td> <td>m</td> <td>1</td> </tr> </table>

The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:

Averages Aptitude Questions

Arithmetic-Aptitude