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Question

Class intervals Frequency
10-20 7
20-30 6
30-40 9

Greater than cumulative frequency of 1st group is.

A
15
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B
22
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C
9
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D
0.0
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Solution

The correct option is B 22
The progressive sum of the frequencies from the last class to the lower boundary of the particular data class is the greater than cumulative frequency.
Marks Frequency Cumulative Frequency
10-20 7 15+7 = 22
20-30 6 9+6 = 15
30-40 9 9+0 = 9

Cumulative frequency for the 1st group is 22.

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