Raxit85
Is not the information in correct option, i.e. (B) None of the films released in country Z in 1992 were based on books other than novels be the restatement of the premise - Exactly 25 of the films released in country Z in 1992 were based on those novels.
Both indicates the same meaning that films released in country Z in 1992 were based on Novel only (as Exactly word indicates in premise).
Hi Raxit85,
Let's take a look at the information we have for books published in Z in 1991:
1. Total number of
books: 50,000
2. Number of
novels: 5,000
Remember that (2) is part of (1). Now let's take a look at the films released in Z in 1992:
3. Total number of films: 100
4. Number of films based on the
novels in (2): 25
Conclusion: no more than 25% (25) of films released in Z in 1992 (100) were based on
books published in country Z in 1991.
So the conclusion shifts from
novels to
books. This is a bit of a problem, as the number 25 from (4) is about number of films based on
novels. What if all 75 of the remaining films were based on some of those 45,000 (50,000 − 5,000) books that are not novels? That would mean that we have 25 films based on novels (a type of book) and 75 films based on non-novel books. 100/100 is 100%, which is not "no more than 25%".
Option B tells us that the number of films released in Z in 1992 based on non-novel books is 0. This is great, as we can now say that the number of films based on
books is 25 (number of films based on novels + number of films based on non-novel books = 25 + 0 = 25). This helps us conclude that no more than 25% of the films released in Z in 1992 were based on books published in Z in 1991.