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题库 / GMATAdvanced-DS-77
If m and n are positive integers,what is the value of ~$\frac{3}{m}$~+~$\frac{n}{4}$~?
(1)mn=12
(2)3/m is in lowest terms and n/4 is in lowest terms.
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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只有合起来时，m=4,n=3的情况下是唯一满足条件的，因此选C
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