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प्रश्न
The expenditure Ec of a person with income I is given by Ec = (0.000035) I2 + (0. 045) I. Find marginal propensity to consume (MPC) and average propensity to consume (APC) when I = 5000.
उत्तर
Ec = (0.000035) I2 + (0. 045) I
`"MPC" = ("dE"_"c")/("dI")`
= 2(0.000035) I + 0.045
For I = 5000,
MPC = 2(0.000035)5000 + 0.045
∴ MPC = 0.35 + 0.045
⇒ MPC = 0.395
APC = `("E"_"c")/"I"`
∴ APC = (0.000035) I + 0.045
For I = 5000,
APC = (0.000035)(5000) + 0.045
⇒ APC = 0.22
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