作业帮GRE数学题一道~Of the 7 members of the city council,4 are Democrat
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GRE数学题一道~
Of the 7 members of the city council,4 are Democrats and 3 are Republicans.T is the total number of different 3-person committees that can be appointed from the council membership such that each committee consists of 3Democrats and 1 Republicans.
问T跟15比大小~答案是t>15!还是我理解错了.感激感激!
Of the 7 members of the city council,4 are Democrats and 3 are Republicans.T is the total number of different 3-person committees that can be appointed from the council membership such that each committee consists of 3Democrats and 1 Republicans.
问T跟15比大小~答案是t>15!还是我理解错了.感激感激!
翻译如下（意译）
市议会的7名成员中,4个是民主党和3是共和党.T表示从议会中抽出不同的3人组成的委员会的总数,且能满足该委员会的3个民主党人和1个共和党人组成一委员会.
明主党和共和党有兼党,不然无法达成每个选出的委员会只有3人,但有3个明主党和1个共和党组成,
所以,至少一个人是兼党
T＞6C2=15
（即选那个兼党的后的选法）
市议会的7名成员中,4个是民主党和3是共和党.T表示从议会中抽出不同的3人组成的委员会的总数,且能满足该委员会的3个民主党人和1个共和党人组成一委员会.
明主党和共和党有兼党,不然无法达成每个选出的委员会只有3人,但有3个明主党和1个共和党组成,
所以,至少一个人是兼党
T＞6C2=15
（即选那个兼党的后的选法）
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