Question

The average age of 5 students is 10 yrs. A student of 14 drop out. Find the average of remaining 4 students.

Answer 1

Number of students=5

Average age of 5students=10

Let sum of 5students=x

Average age=sum of5 students/ number of students

10=x/5

X=10*5

X=50

A student of 14drop out

Then sum of ages 4students=50-14

=36

Now average age of 4 students =sum of ages of 4 students/number of students

Average age =36/4

=9

Conclusion:

Average of 4 students =9yrs