7. The following is the data of pocket
expenditure per week of 50 students in a
class. It is known that the median of the
distribution is 120. Find the missing
frequencies
Expendi- 0-50
50-
100
100-
150
150-
200
200-
250
ture per
week
(in)
No. of
students
7
?
15
?
3
by Quartiles method
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