60% do A; 70% do B. Which of the following could be the percent o

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60% do A; 70% do B. Which of the following could be the percent of people who do both A and B?

答案：C

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老师请问这题怎么做呀？

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老师，可以再讲一遍么，不是很会看这个表格，可以用画图么这道题？麻烦了

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麻烦请问老师，这道题为什么不是0.3呀

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