题目内容
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题目材料:
Notes:
(1) The total population was 260,341,000.
(2) Age-group determined by age, in years, at last birthday.
Which of the following information, if any, together with the information given, is sufficient to determine the average (arithmetic mean) age for the population?
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AThe number of people in each age-group
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BThe average age for each age-group
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C The median age for each age-group
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DThe median age for the population
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ENo additional information is needed; the information given is sufficient.
B显示答案