30. The mean of the following distribution is 18. Find the frequency of the class 19-21
Class
11-13
21-23
23-25
13-15
15-17
17-19
19-21
3
5
Frequency
6
9
13
Answers
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Answer:
- 20
21 - 50
51 - 70
71 - 80
81 - 100
frequency
6
12
30
14
7
Step-by-step explanation:
- 20
21 - 50
51 - 70
71 - 80
81 - 100
frequency
6
12
30
14
7
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