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Question

Find the consumer price index number for 1991 on the base of 1990 from the following data using the method of weighted relatives.

ItemQuantity(units)Price in 1990Price in 1991
A20200320
B14400420
C15100120
D184060
E102028

A
123.45
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B
113.47
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C
198.26
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D
137.27
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Solution

The correct option is D 137.27
ItemQuantity
(Units) w
Pricein1990
P0
Pricein1991
P1
Pricerelative
I=P1P0×100
Iw
A20 200 320 160 3200
B14 400 420 105 1470
C 15 100 120 120 1800
D 18 40 60 150 2700
E10 20 28 140 1400
Total()77 10570
P01=Iww=1057077=137.27

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