This question asks us to calculate the sum of the average GDPs of two countries, Country A and Country B, over a period of five years (Y1 to Y5). We are given a table containing the GDP values for each country in each year.

We need to find the value of K1 + K2, where:

• K1 = Average GDP of Country A over 5 years.
• K2 = Average GDP of Country B over 5 years.

Calculating Average GDP for Country A (K1)

To find the average GDP for Country A, we need to sum the GDP values for Country A across all five years and divide by the number of years, which is 5.

Sum of GDP for Country A = GDP(Y1) + GDP(Y2) + GDP(Y3) + GDP(Y4) + GDP(Y5)

Sum of GDP for Country A = 175 + 200 + 150 + 75 + 50 = 650

Now, calculate the average GDP (K1):

K1 = $\frac{\text{Sum of GDP for Country A}}{\text{Number of years}}$

K1 = $\frac{650}{5}$

K1 = 130

So, the average GDP of Country A (K1) is 130.

Calculating Average GDP for Country B (K2)

Similarly, to find the average GDP for Country B, we sum the GDP values for Country B across all five years and divide by 5.

Sum of GDP for Country B = GDP(Y1) + GDP(Y2) + GDP(Y3) + GDP(Y4) + GDP(Y5)

Sum of GDP for Country B = 285 + 300 + 125 + 85 + 95 = 890

Now, calculate the average GDP (K2):

K2 = $\frac{\text{Sum of GDP for Country B}}{\text{Number of years}}$

K2 = $\frac{890}{5}$

K2 = 178

So, the average GDP of Country B (K2) is 178.

Calculating the Value of (K1 + K2)

Finally, we need to find the sum of the average GDPs of the two countries, which is (K1 + K2).

(K1 + K2) = 130 + 178

(K1 + K2) = 308

The value of (K1 + K2) is 308.

Revision Table: Average GDP Calculation

Final Calculation: K1 + K2 = 130 + 178 = 308.

Additional Information: Understanding Average GDP

Average GDP is a simple measure used to understand the typical economic output of a country over a specific period. It is calculated by summing the GDP values for each year in the period and dividing by the total number of years. This gives a single value that represents the central tendency of the GDP data over that time. While useful for comparisons, it doesn't show variations or growth trends within the period. Other measures like growth rates provide more insight into economic performance changes over time.