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If GDP rises from $4 trillion in 1986 (base year) to $5 trillion in 1989, and the GDP deflator in 1989 is 120, what is the real GDP in 1989?

A) $4 trillion
B) $4.17 trillion
C) $5 trillion
D) $6 trillion

Answer :

Final answer:

The real GDP in 1989 is calculated using the GDP deflator to adjust for inflation. With a nominal GDP of $5 trillion and a GDP deflator of 120, the real GDP comes to $4.17 trillion. The correct answer is b) $4.17 trillion.

Explanation:

To calculate the real GDP in 1989, we need to use the GDP deflator, which is a measure of inflation. First, we divide the GDP deflator for 1989 (120) by 100 to get 1.2. Then, we divide the nominal GDP for 1989 ($5 trillion) by the GDP deflator (1.2) to obtain the real GDP:

Real GDP = Nominal GDP / GDP deflator = $5 trillion / 1.2 = $4.17 trillion

The real GDP in 1989 can be calculated by adjusting the nominal GDP for the change in prices since the base year using the GDP deflator.

Real GDP = Nominal GDP / (GDP Deflator / 100)

Using the provided information, plug in the numbers:

Real GDP = $5 trillion / (120 / 100)

Real GDP = $5 trillion / 1.2

Real GDP = $4.17 trillion

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