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A total of 40 tourists went on a trip. If 18 of the tourists visited site X, 18
A total of 40 tourists went on a trip. If 18 of the tourists visited site X, 18
游客
2024-01-12
52
管理
问题
A total of 40 tourists went on a trip. If 18 of the tourists visited site X, 18 visited site Y, and 8 visited both site X and site Y, how many visited neither site X nor site Y?
选项
A、4
B、10
C、12
D、22
E、28
答案
C
解析
总计40个游客去旅行,若18人参观了景点X,18个人参观了景点Y,8个人既参观了景点X又参观了景点Y,问有多少人既未参观景点X,又未参观景点Y?
解:本题的正确答案为(C)。显然可用图形来直观表示:
因此既未参观景点X,又未参观景点Y的人数为:40-(18+18-8)=12人
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