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Size of agriultural holdings in a surv...

Size of agriultural holdings in a survey of 200 families is given in the following table :
`{:("Size of agricultural hlodings (in ha) ","Number of families "),(" "0-5," "10),(" "5-10," "15),(" "10-15," "30),(" "15-20," "80),(" "20-25," "40),(" "25-30," "20),(" "30-35," "5):}`
Compute median and mode size of the holdings.

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The correct Answer is:
Median = 17.81 hectares ; Mode = 17,78 hectares
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