For the following distribution, calculate the range of data
Marks
20-30
30-40
40-50
50-60
60-70
70-80
80-90
No. of students
4
6
10
25
7
5
2
A
30
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B
40
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C
70
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D
80
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Solution
The correct option is B70 For the distribution, range is the difference between upper limit of the last interval and the lower limit of the first interval.
From the given table, The upper limit of the last interval is 90 and