Answer:
G = $20 Billion
Step-by-step explanation:
Given that
C = $60 billion
GDP = $100 billion
Gross Investment = $30 billion
Net export = $10 billion
Recall that
GDP = C + Ig + G + Xn
Therefore
G = GDP - ( C + Ig + Xn )
G = 100 - ( 60 + 30 + [-10])
G = 100 - (90 - 10)
G = 100 - 80
G = 20
Thus, government expenditure is $20 billion.