Question

21. The following are the daily expenditures (in Rs.) of 30
students in a school :-
Expenditure No. of students
10 - 15
3
15 - 20
5
20 - 25
10
25 - 30
6
30 - 35
4
35 - 40
2
a) What is the upper limit of the class interval 30–35 ?
b) What is the class - size ?
c)
Find the class mark of 20-25 and 25-30.​

Answer 1

Answer:

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