In the above frequency distribution, the adjusted frequency of the fourth class interval is

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Solution

The correct option is C
2

Here the class intervals are of unequal width, so adjusted frequency

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Similar questions

Class interval :	5 – 10	10 – 15	15 – 25	25 – 45	45 – 75
Frequency :	6	12	10	8	15

The marks obtained by 25 students in a class are as follows

22, 28, 30, 32, 35, 37, 40, 41, 43, 44, 45, 45, 48, 49, 52, 53, 54, 56, 56, 58, 60, 62, 65, 68, 69

(i) Arrange the above data on frequency distribution taking class interval.

20-29, 30-39, 40-49, 50-59, 60-69

(ii) Form the cumulative frequency distribution.

In a frequency distribution, the first and the second class intervals are 0 -10 and 10 -20. Then, the lower limit of the fourth class interval is

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