OAs ADURO 03 - OCT 18

OAs ADURO 03 - OCT 18

For questions 23 to 25:
Since at least one student from each stream does not buy the
set of books, the percentage of students buying the set of
books can never be 100 in any stream.
If the percentage of students in Science stream buying the set
of books is less than or equal to 60 then the total number of
students in Science stream will have to be equal to or more
than 540. This is not possible because then the number of
students from the remaining 3 streams will be less than or
equal to 360, which in turn will be less than the number of
students buying the sets of books from the other three streams.
If the percentage of students in Science stream buying the set
of books is either 70 or 80, then the total number of students in
Science stream is not an integral multiple of 10.