Marks Number of Candidates More than 10 100 More than 20 75 More than 30 60 More than 40 40
To find the average marks of the candidates, we have to convert this cumulative frequency distribution into a frequency distribution, and then determine the mean.
| Marks Interval | Number of Candidates (f) |
|---|---|
| 10-20 | 25 |
| 20-30 | 15 |
| 30-40 | 20 |
| 40-50 | 40 |
Therefore, the average marks of the candidates are 32.5.
What is the median of the distribution ?
In a colony 5 families have 1 child, 7 families have 2 children, 8 families have 3 children and 3 families have 4 children.What is the mode of the number of children.
For which set of numbers do the mean, median and mode all have the same value?
The median of 5, 8, 25, 22, 34, 18 is
Find the mean of first 5 two-digit multiples of 4.
The difference between the upper limit and the lower limit of a class is called :