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题库 / GMATAdvanced-DS-3
A country's per capita national debt is its national debt divided by its population. Is the per capita national debt of Country G within $5 of $500?
(1) Country G's national debt to the nearest $1,000,000,000 is $43,000,000,000
(2) Country G's population to the nearest 1, 000,000 is 86,000,000
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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题干：debt/population的范围是否在【495,505】内？
1.debt四舍五入到十亿分为为43,000,000,000，则42,500,000,000<=debt<=43,400,000,000 ,未知人口数量，不充分
2.人口四舍五入到百分位为86,000,000，则85,500,000<=人口<=86,400,000 ,未知debt数量，不充分
1+2 42,500,000,000/86,400,000得d/p下限，43,400,000,000/85,500,000得上限，范围大于495到505的范围，即有可能满足也可能不满足题干，不充分
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