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Number of villages with respect to their population as per India census 2011 are given below.

Population (in thousands) 12 5 30 20 15 8
Villages 20 15 32 35 36 7

Find the average population in each village.

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Population (in thousands xi ) Villages fi x1 fi
12 20 240
5 15 75
30 32 960
20 35 700
15 36 540
8 7 56

Σfi = 145 

Σfi xi = 2571 

\(\overline x = \frac {\sum f_ix_i}{\sum f_i}\)

Mean = 2571/145 = 17.731 thousands

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