defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Statistics Measures of Central Tendency
A random sample of 20 people is classified in the following table according to their ages:
|
Age |
Frequency |
|
15 – 25 |
2 |
|
25 – 35 |
4 |
|
35 – 45 |
6 |
|
45 – 55 |
5 |
|
55 - 65 |
3 |
What is the mean age of this group of people?
1
41.0
2
41.5
3
42.0
4
42.5