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The average age of a class of 20 students
is 15 years. When they are mixed with
another section havin@o students, the
By Kaylee

The average age of a class of 20 students
is 15 years. When they are mixed with
another section havin@o students, the
average age of the class becomes 14
years. What is the average age of the 10
students of the second section?​

About the author
Kaylee

6. Find the ratio of the following:

(a) 81 to 108

(b) 98 to 63

(c) 33 km to 121 km

(d)

1. Write how you can keep yourself and others safe when there is a party
in your house.

1 thought on “The average age of a class of 20 students<br />is 15 years. When they are mixed with<br />another section havin@o students, the<br”

  1. Answer:

    12

    Step-by-step explanation:

    20( number of students)×15(average age of the 20 students) =300( Total age of 20 students)

    The second section has 10 students.

    so,

    20+10= 30( Number of students) × 14( average age of the 30 students)= 420(Total age of 30 students)

    now the difference between the Total age is 420-300=120

    The Total age of 10 students are 120.

    Now the average is 120/10= 12

    Reply

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