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Question

The given table shows the marks obtained and the frequency. The cumulative frequency is ________

MarksFrequency10−20420−30930−40640−5010


A

20

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B

29

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C

24

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D

16

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Solution

The correct option is B

29


The cumulative frequency of a class interval is the sum of the frequencies of all classes upto that class including the frequency of that class.

Hence the cumulative frequency of the given data is

MarksFrequencyCumulative frequency102044203094 + 9 = 13304064 + 9 + 6= 194050104 + 9 + 6 + 10= 29


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