Exemplar Exercise Problem VI — task. Mathematics CBSE, Class 10.

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Consider the following distribution:

Marks obtained	Number of students
More than or equal to $0$	$63$
More than or equal to $10$	$58$
More than or equal to $20$	$55$
More than or equal to $30$	$51$
More than or equal to $40$	$48$
More than or equal to $50$	$42$

the frequency of the class

$30-40$ is

$48$
$51$
$4$
$3$

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