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The lengths of \(40\) leaves of a plant are measured correct to the nearest millimetre, and the data obtained is represented in the following table :
 
Length (in mm) Number of leaves
\(118-126\) \(3\)
\(127-135\) \(5\)
\(136-144\) \(9\)
\(145-153\) \(12\)
\(154-162\) \(5\)
\(163-171\) \(4\)
\(172-180\) \(2\)
 
Find the median length of the leaves.
 
Answer:
 
Median \(=\) mm
 
[Note: Enter the answer upto \(2\) decimals.]
 
(Hint : The data needs to be converted to continuous classes for finding the median, since the formula assumes continuous classes. The classes then change to \(117.5 - 126.5\), \(126.5 - 135.5\), . . ., \(171.5 - 180.5\).)