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  3. There are 189 members in a tennis club; 8 have been at the club less than three

There are 189 members in a tennis club; 8 have been at the club less than three

游客2024-08-07  58
问题 There are 189 members in a tennis club; 8 have been at the club less than three years; 11 are under 20 years of age; 70 wear spectacles; 140 are men.
What is the smallest number of players who have been members for three years or more, are at least 20 years of age, wear glasses and are men?
选项
答案 2
解析 (分别算出多于3年的为181人，不戴眼镜的为119人，女性为49人，且题目已知20岁以下为11人，则18l一11一119—49=2。)
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