OG13TH data efficiency其中一题是不是答案有问题

kevinxiao119

data efficiency practice questionquestion 89
A number of people each wrote down one of the first 30 positive integers.Were any of the integers written down by more than one of the people?
(1)  the number of people who wrote down an integer was greater than 40
(2)  the number of people who wrote down an integer was less than 70
答案   A
答案他怎么就能是A呢？求各位解释

kevinxiao119

好吧~我承认昨天半夜愣是脑残了