For the following distribution the frequency of the class 70-80 is
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Answered by
4
Answer:
78 is the correct answer
Answered by
1
Answer:
10
Step-by-step explanation:
The cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors.
Frequencies are :-
- More than 90 = 5
- More than 80 = 20 - 5 = 15
- More than 70 = 30 - 20 = 10
- More than 60 = 48 - 30 = 18
- More than 50 = 60 - 48 = 12
Therefore , the frequency of the class 70-80 is
10 .
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