题目信息
In a certain group, the average (arithmetic mean) age of the males is 28, and the average age of the females is 30. If there are 100 people in the group, how many of them are males?
(1) The average age of all 100 people is 28.9
(2) There are 10 more males than there are females.
(1) The average age of all 100 people is 28.9
(2) There are 10 more males than there are females.
A:Statement 1 ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient.
B:Statement 2 ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient.
C:BOTH statements 1 and 2 TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient.
D:Each statement ALONE is sufficient to answer the question.
E:Statement 1 and 2 TOGETHER are NOT sufficient to answer the question.
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正确答案：
D:Each statement ALONE is sufficient to answer the question.
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