Question

For a particular year, following is the distribution of ages (in years) of primary school teachers in a
district:
15 - 20
20 - 25
25 - 30
30 .35
35.40
40.45
45 - 50
Age (in years)
No. of Teachers
10
30
50
50
30
6
4
1. Write the lower limit of first class interval.
2. Write the upper limit of the last class interval.
3. Find the number of teachers whose age is more than 25 years.
4. Determine the class size.
5. The class mark of the class 25-30 is​

Answer 1

I). a

ii). c

iii). b

iv). c

v). a