explain the sources of data
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there are two sources of collecting data
a)Primary source
b)Secondary source
a)-it is that source in which data is collected from directly public by the means of survey,questionnaire etc .
this data is raw data. this involves huge time, huge amount of money and large manpower
b)-in this data is based upon another data as this data is based upon primary data which is earlier collected. it involves less time , less money and less manpower is required
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