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3. The weekly wages (in $Rs.$ ) of $30$ workers in a factory are.

$830,835,890,810,835,836,869,845,898,890,820,860,832,833,855,845,804,$ $808,812,840,885,835,836,878,840,868,890,806,840$

Using tally marks make a frequency table with intervals as 800–810, 810–820 and so on.

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Using tally marks a frequency table with intervals as 800–810, 810–820 and so on is as shown : .

Intervals	Tally MARKS	Frequency
$800-810$	$\mid \mid \mid$	$3$
$810-820$	$\mid \mid$	$2$
$820-830$	$\mid$	$1$
$830-840$	$\bcancel{\mahsf{\mid \mid \mid \mid }} \mid \mid \mid \mid$	$9$
$840-850$	$\bcancel{\mahsf{\mid \mid \mid \mid }}$	$5$
$850-860$	$\mid$	$1$
$860-870$	$\mid \mid \mid$	$3$
$870-880$	$\mid$	$1$
$880-890$	$\mid$	$1$
$890-900$	$\mid \mid \mid \mid$	$4$

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