Correct Answer - Option 2 : (∑Qn
Calculation
In constructing quantity index number, we measure the changes in quantities and when we use price or value as weight. Quantity indices can be easily obtained by changing p to q and q to p
∴ Paasche quantity indices is (∑QnPn)/(∑QoPn)
Qn = Current year quantity
Pn = Price index for current year
QO = Quantity for base year