Answer:-The cumulative frequency Table is:-
Class | Frequency | Cumulative frequency |
0-5 | 10 | 10 |
5-10 | 15 | 25 |
10-15 | 12 | 37 |
15-20 | 20 | 57 |
20-25 | 9 | 66 |
Here,
N2=662=33
Thus 37 is just greater than 33,
∴ The median class is "10−15."
The lower limit of the median class is 10.
Modal class = class with maximum frequency.
∴ Modal class is 15−20.
The lower limit of the modal class is 15.
Sum of lower limits of median class and modal class = 10+15=25