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题库 / Prep2007E2-DS-185
Of the 200 members of a certain association, each member who speaks German also speaks English, and 70 of the members speak only Spanish. If no member speaks all three languages, how many of the members speak two of the three languages?
(1) 60 of the members speak only English.
(2) 20 of the members do not speak any of the three languages.
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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列方程：n+e+g+d+s=200,其中e=只说英语=英语-德语，n=一种都不会，s=只说西语，d=both(英语和西语)。s=70, 求d+s？
(1)e=60
(2)n=20
both
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