OG 11th 180 句意请教

In a nationwide
poll, N people were interviewed. If 1/4 of them answered “yes” to question 1, and
of those, 1/3 answered “yes” to question2, which
of the following expressions represents the number of people interviewed who did
not answer ”yes” to both question?
            

我看到of those时，有一个疑惑，是指原来的总人数1/3说yes，或是总人数中的1/4人中的再1/3说yes？those指代哪个？好像是后者，但是我不很肯定

请教大家，谢谢

感谢版主回答

没有对两题都say yes, 它的反面情况不是都say no

只要用1减去对两道题都say yes的就行了