Q. 4 B5.0( 1 Vote )

# Attempt any two o

First find the cumulative frequency of the observations and n = 300.

A median class with cumulative frequency greater than or equal to 150 is 30 – 40.

On using formula,

where L means lower boundary of the median class,

n means sum of frequencies,

CF means cumulative frequency before the median class,

F means frequency of the median class,

h means the size of the median class.

Here, L = 30, CF = 102, F = 55, h = 40 - 30 = 10

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