Question

It is found that 70% of the visitors to the library are students, and that 82% of those who are not students are adults. What percentage of library visitors are adults?

a) 18%

b) 30%

c) 28%

d) 82%

Answer 1

To find the percentage of library visitors who are adults, subtract the percentage of students from 100% and multiply by the percentage of non-students who are adults.

Step-by-step explanation:

To find the percentage of library visitors who are adults, we need to first find the percentage of visitors who are not students. From the given information, we know that 70% of visitors are students. Therefore, the percentage of visitors who are not students is 100% - 70% = 30%.

Next, we are told that 82% of those who are not students are adults. To find the percentage of visitors who are adults, we multiply the percentage of visitors who are not students by the percentage of non-students who are adults: 30% * 82% = 0.30 * 0.82 = 0.246 = 24.6%. Therefore, the percentage of library visitors who are adults is 24.6%.