21
For the following distribution :
Class
Frequency
0-5
10
5-10
15
10-15
12
15-20
20
20-25
9
The sum of lower limits of median class and modal class is :
Class
Frequency
0-5
10
5-10
15
10-15
12
15-20
20
20-25
9
The sum of lower limits of median class and modal class is :

- (a)$15$
- (b)$25$
- (c)$30$
- (d)$35$
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(b) $25$