It is given that： 2 / k + 4 / m = r / s, where r / s is the fraction in lowest term,
Is s = km?
1. k and m are prime numbers
2. k and m have no common factors except 1.
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AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
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BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
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CBoth statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
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DEACH statement ALONE is sufficient.
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EStatements (1) and (2) TOGETHER are NOT sufficient.
显示答案
正确答案: E