In price index, when a new commodity is required to be added, which of the following index is used?

Fisher's ideal formula for calculating index number satisfies the ________

Shifted Price Index = $\displaystyle$$\displaystyle \frac{\text{Original Price Index}}{\text{Price Index of the year on which it has to be shifted}}$ $\displaystyle \times$ 100

If Laspeyres's Index Number is 250 and Paasche's Index Number is 160, then Fisher's Index number is

If $\displaystyle$$\displaystyle \sum$ P_0q_0 = 240, $\displaystyle$$\displaystyle \sum$ P_1q_0 = 480, $\displaystyle$$\displaystyle \sum$ P_0q_1 = 600 and $\displaystyle$$\displaystyle \sum$ P_1q_1 = 192, then Laspeyres's Index Number is

If $\displaystyle$$\displaystyle \Sigma$ P_n q_n = 249, $\displaystyle$$\displaystyle \Sigma$ P_0 q_0 = 150, $\displaystyle$$\displaystyle \Sigma$ P_n q_0 = 145 and Paasche's Index Number = 150, then Fisher's Ideal Price Index Number is

From the following data, find out an Index number for 2022 taking 2021 as base (using simple aggregative method): A (80, 120), B (220, 200), C (300, 400).