题目信息
What is the average (arithmetic mean) of a and b?
(1) The average (arithmetic mean) of a + 2 and b + 7 is 12
(2) The average (arithmetic mean) of a, b and 6 is 7
(1) The average (arithmetic mean) of a + 2 and b + 7 is 12
(2) The average (arithmetic mean) of a, b and 6 is 7
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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