The given cumulative frequency distribution shows the class intervals and their corresponding cumulative frequency. Then the frequency of class intervals 20-30 is :
class :- 10-20 | 20-30 | 30-40
cumulative frequency :- 5 | 14 | 25
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Answer:
Frequency of 20-30=9
Step-by-step explanation:
Classes
Frequency
10-20
20-30
30-40
Cumulative
Frequency
5. 5
14. 9
25. 11
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