Answer:
Other things unchanged, a tax reduction of $10 billion will increase the equilibrium GDP by $25 billion when the MPS is 0.4.
Explanation:
An increase in government spending of $10 billion will increase the equilibrium GDP by $25 billion when the MPS is 0.4.
Tax cuts/increases do not have the same effect as changes in government spending. The multiplier = 1/MPS is used to measure how an economy will react as a result of a change in government spending.