word problems

word problems

Postby Guest » Wed May 16, 2018 3:00 am

In a survey, the respondents asked two questions. In the first question, 85% of respondents answered correctly, while the second question answered 75% of the respondents correctly, while 120 respondents responded correctly in the two questions asked. If each respondent answered at least one question, then how many people responded correctly only to the first question?
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Re: word problems

Postby Monox D. I-Fly » Tue May 22, 2018 1:47 am

I got [tex]\frac{120}{100%-85%}\times85%=\frac{120}{15%}\times85%=8\times85=680[/tex].

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