1.

In an economy , the equilibrium level of income is Rs.12,000 crore. The ratio of marginal propensity to consume and marginal propensity to save is 3:1. Calculate the additional investment needed to reach a new equilibruim level of income of Rs. 20,000 crore.

Answer»


Solution :Ratio of 3:1 between MARGINAL propensity to consume (MPC) and marginal propensity to save (MPS) signifies : MPC`=(3)/(4)` or `0.75` and MPS `= (1)/(4)` or`0.25.`
Multiplier (K) `= (1)/(MPS)=(1)/(0.25)=4`
We ALSO know: k `=("Change in Income"(DeltaY))/("Change in Investment"(Deltal))`
Given: Change in Income `(DeltaY) =20,000 = Rs. 8,000` crores
i.e., `=(8,000)/("Change in Investment"(Deltal))`
Hence, Change inInvestment `(Deltal) = Rs. 2,000` crores


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