Answer :
We may observe that the given data be maximum class frequency is 40 belonging to 1500- 2000 intervals
So, modal class = 1500- 2000
l=1500, f=40, f0=24, f2=33, h=50
=
=1500 + 347.826
=1847.826
So, modal class monthly expenditure was Rs. 1847.83
We may compute class marks (xi) as per the relation:
Xi=
h= 500, A=2750
∑xi=200,
(x̅) mean =
(x̅) =
=2750-87.5
=2662.5
So, mean monthly expenditure was Rs. 2662.50
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