Question

Collect data from your friends, neighbours and classmates to know more about “milk teeth".

Tabulate your data. One way of doing it is given below:

S.No.	Age at which first tooth fell	Age at which last tooth fel	No. of teeth lost	No. of teeth replaced
1.
2.
3.
4.
5.

Find out from at least twenty children and find the average age at which children lose the milk teeth. You may take help of your friends.

Answer 1

S.No.	Age at which first tooth fell	Age at which last tooth fel	No. of teeth lost	No. of teeth replaced
1.	6 year	11 year	20	30
2.	6 year	12 year	20	28
3.	7 year	12 year	20	28
4.	7 year	13 year	20	32
5.	7 year	13 year	20	28

To collect data about “milk teeth,” ask at least twenty children the following questions:

1. At what age did your first tooth fall out?
2. At what age did your last tooth fall out?
3. How many teeth have you lost?
4. How many teeth have been replaced?

Calculating the Average Age:

1. Sum the ages at which the first tooth fell out for all twenty children and divide by 20 to get the average age for the first tooth loss.
2. Sum the ages at which the last tooth fell out for all twenty children and divide by 20 to get the average age for the last tooth loss.