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The lengths of 40 leaves of a plant are ...

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.

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The correct Answer is:
146.75 m m
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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: Find the median length of the leaves. (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.)

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