To calculate the Real GDP using the nominal GDP and the GDP deflator, you can use the following formula:
\[ \text{Real GDP} = \frac{\text{Nominal GDP}}{\text{GDP Deflator}} \times 100 \]
Given:
- Nominal GDP = 7.8 billion dollars
- GDP Deflator = 120
Now, plug the values into the formula:
\[ \text{Real GDP} = \frac{7.8 \text{ billion}}{120} \times 100 \]
Calculating that:
\[ \text{Real GDP} = \frac{7.8}{120} \times 100 = 6.5 \text{ billion dollars} \]
Therefore, the correct answer is:
6.5 billion dollars