Question

Instructions: The following bar graph gives the production, exports and per-capita consumption of rice in country A, for the five years from 2006 to 2010. Consumption = Production - Exports. Per Capita Consumption = Consumption ÷ Population.

Reading the chart precisely gives this table:
2006: Consumption = 72.5 million kg, Per-capita consumption = 36.25 kg
2007: Consumption = 88 million kg, Per-capita consumption = 35.2 kg
2008: Consumption = 108 million kg, Per-capita consumption = 38.7 kg
2009: Consumption = 105 million kg, Per-capita consumption = 40.5 kg
2010: Consumption = 127 million kg, Per-capita consumption = 42 kg

What is the population of country A in the year 2008 (in million)?

• A. 2.64 million
• B. 2.72 million
• C. 2.79 million
• D. 2.85 million

Hint:

Population = Consumption divided by per-capita consumption, using the 2008 figures.

Answer 1

The Correct Option is C

Step 1: Recall the relationship.
Per Capita Consumption \(=\dfrac{\text{Consumption}}{\text{Population}}\), so Population \(=\dfrac{\text{Consumption}}{\text{Per Capita Consumption}}\).

Step 2: Substitute the 2008 values.
Population(2008) \(=\dfrac{108}{38.7}\approx2.79\) million.

Step 3: Final Answer.
The population of country A in 2008 was about 2.79 million, so option C is correct.