Answer to Question #242271 in Macroeconomics for Olu

Question #242271
If 75% of any increase in income is spent on consumption, then increases in autonomous investment of R1 billion results in an increase in national income of as much as :

I.R4 billion
ii.R1.33 billion
iii.R6 billion
iv R5 billion
1
Expert's answer
2021-09-27T11:14:20-0400

TR4 billion is the correct answer as calculated below


If R1 billion represent the remaining 25%

R1=25%R1=25\%


Then, an increase in consumption will be calculated as follows;


=R1×75%25%=\frac {R1\times 75\%}{25\%}


=R3Billion=R3 Billion

Hence, an increase in national income will as much as;


R3+R1=R4 BillionR3+R1=R4 \space Billion

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