Less than’ cumulative frequency table for a given data is as follows. Then, the frequency of class interval 20-30 is: Marks Less than 10 Less than 20 Less than 300 Less than 40 Cumulative frequency 3 17 37 92

Less than’ cumulative frequency table for a given data is as foll…

MCQ

Less than’ cumulative frequency table for a given data is as follows. Then, the frequency of class interval $20-30$ is:

Marks	Less than $10$	Less than $20$	Less than $300$	Less than $40$
Cumulative frequency	$3$	$17$	$37$	$92$

✓
$20$
B
$14$
C
$34$
D
$55$

✓

Answer

Correct option: A.

$20$

A cumulative frequency distribution is the sum of the class and all classes below it in a frequency distribution.
Less than $30$ has the class interval $20-30.$ Frequency of this class interval will be corresponding to.

Marks	Cumulative frequency	Class	Frequency
Less than $10$	$3$	$1-10$	$3$
Less than $20$	$17$	$10-20$	$14$
Less than $30$	$37$	$20-30$	$20$
Less than $40$	$92$	$30-40$	$55$

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