Answer :

total number of households = 35

∴ the median is the usage of 18^{th} household.

which lies between 110-120 and in this range there are 8 households.

let’s assume a uniform distribution.

i.e., 14^{th} household’s usage is 110 and 15^{th} household’s usage is 110 +

=

⇒ usage of 18^{th} household =

⇒ usage of 18^{th} household = 115

∴ 115 is the median value

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