Official Explanation
1. The increase in the estimated year-end population of Territory C from 1990 to 2010 accounts for approximately______________% of the increase in the estimated year-end population of Nation X over the same period.
Explanation
Measured in thousands, the estimated year-end population of Territory C was approximately 2,900 in 1990 and 4,600 in 2010, for an increase of approximately 4,600 − 2,900, or 1,700, over that period. The total estimated year-end population of Nation X, in thousands, was 17,000 in 1990 and 22,500 in 2010, an increase of 22,500 − 17,000, or 5,500. Thus, Territory C’s population increase represents 100 (1,700/5,500), or 30 10/11, percent of the total increase.
The correct answer is 30.
2. In 2010, the estimated total year-end population of the 3 territories was of the estimated year-end population of Nation X.
Explanation
Measured in thousands, the 2010 estimated year-end population was approximately 7,250 for Territory A, approximately 5,600 for Territory B, and approximately 4,600 for Territory C, for a combined total of approximately 17,450. The estimated total year-end population, in thousands, of Nation X for 2010 was 22,500. Thus, the estimated total of the three territories represents 100 (17,450/22,500), or 77 \(\frac{5}{9}\), percent of the estimated year-end total population of Nation X in 2010.
The correct answer is between 70% and 80%.