Explanation:

- Statement A tells us the percentages of families reading newspapers A and B. However, it does not provide information about those who read both.

- Statement B gives the total number of families, which is 200, but does not indicate overlap in readership.

- Considering both statements together, we know the percentages for individual newspapers and the total families but lack data on families reading both papers.

Since we cannot determine the overlap of readership from the data provided, the correct choice is:

Option 3: Both statements together are not sufficient; additional information is needed.