In an Arecanut survey, the total number of arecanut trees in
30 randomly selected villages in a subdivision were counted for two successive
years,1990 − 91, 1991 − 92, to study the change in the number of trees.The first 10
villages were common to the two years.The total number of villages in a subdivision
was 1878

In an Arecanut survey the total number of arecanut trees in 30 randomly selected villages in a subdivision were counted for two successive years1990 91 1991 92 class=
In an Arecanut survey the total number of arecanut trees in 30 randomly selected villages in a subdivision were counted for two successive years1990 91 1991 92 class=


Answer :