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INDEX NUMBER — Statistics STD 12 Commerce — Question

Gujarat BoardEnglish MediumSTD 12 CommerceStatisticsINDEX NUMBER1 Mark
Question
State the main difference between fixed base method and chain base method and chain base method.
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Answer

In fixed base method a stable period or year with usual events or situation is selected as a normal year or base year. In chain base method, for every current year, its preceding year is taken as a base year.

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