Sum
The distribution, given below, shows the marks obtained by 25 students in an aptitude test. find the mean, median and mode of the distribution.
| Marks obtained | 5 | 6 | 7 | 8 | 9 | 10 |
| No.of students | 3 | 9 | 6 | 4 | 2 | 1 |
Advertisement Remove all ads
Solution
| Marks obtained(x) | No.of student (f) | c.f | fx |
| 5 | 3 | 3 | 15 |
| 6 | 9 | 12 | 54 |
| 7 | 6 | 18 | 42 |
| 8 | 4 | 22 | 32 |
| 9 | 2 | 24 | 18 |
| 10 | 1 | 25 | 10 |
| total | 25 | 171 |
Number of terms=25
Mean=`171/25=6.84`
Median`= (25+1^("th"))/2 "term" = 13^"th" "term" =7`
Mode = 6 as it has maximum frequencies i.e. 6
Concept: Concept of Median
Is there an error in this question or solution?
Advertisement Remove all ads
APPEARS IN
Advertisement Remove all ads
Advertisement Remove all ads
