The ages of 40 students of a group are given below :
Age (in years) Number of students
12 6
13 8
14 5
15 7
16 9
17 5
Find the mean age of the group.
Measures of Central Tendency
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Question

The ages of 40 students of a group are given below : Age (in years) |Number of students ----|---- 12 | 6 13 | 8 14 | 5 15 | 7 16 | 9 17 | 5 Find the mean age of the group.

KnowledgeBoat · Accepted Answer

Age (x) |Number of students (f)| fx ----|----|---- 12 | 6 |72 13 | 8 | 104 14 | 5 | 70 15 | 7 | 105 16 | 9 | 144 17 | 5 | 85 Total| f = 40| fx = 580| We know that, n = f = 40. By formula, Mean = = 14.5 years Hence, mean age of the group is 14.5 years.

Variate	frequency
5	7
6	8
7	14
8	11
9	10

Number of misprints per page	Number of pages
0	154
1	95
2	36
3	7
4	6
5	2

Mathematics

The ages of 40 students of a group are given below :
Age (in years) Number of students
12 6
13 8
14 5
15 7
16 9
17 5
Find the mean age of the group.

Measures of Central Tendency

Related Questions

The mean weight of 60 students of a class is 52.75 kg. If the mean weight of 25 of them is 51 kg, find the mean weight of the remaining students.

The mean of five numbers is 18. On excluding one number, the mean becomes 16. Find the excluded number.

Find the mean of the following frequency distribution :
Variate frequency
5 7
6 8
7 14
8 11
9 10

In a book of 300 pages, the distribution of misprints is shown below :
Number of misprints per page Number of pages
0 154
1 95
2 36
3 7
4 6
5 2
Find the average number of misprints per page.