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Calculate investment expenditure from the following data about an economy which is in equilibrium
National income=1000
Marginal propensity tosave=0.25
Autonomous consumption expenditure=200

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`Y=C+I`
` = (barC+bY)+I`
`= ( barC +MPC " of " Y+I`
`=200+(1-0.25 " of Y +I)+I`
`=200+0.75 " of " 1,000 +I`
`1,000=200+750+I`
` I= 1,000 -950`
` =50`

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