Question

How to find the median of grouped data

Answer 1

Obtain cumulative frequencies 
Identify median class by n/2
Apply the formula l+n/2-c.f/f*i

Answer 2

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$\frac{ \frac{n}{2} + cf }{f} \times h$

$where \: n = frequency$

$cf = cumiliative\: frequenct$

$h = class \: interval$

$and \: f = frequency$

$<marquee direction="left">$ first take the n/2th term and then use the above mentioned formula