$begingroup$ For (a), a straightforward way to have a look at is that you have reduced your likelihood House to just the combinations that have at least a single boy: Last but not least preserve Checking out till locating the exact match exactly where both rental value & quality fits https://girlspgingurugramsector15part2.blogspot.com/2025/07/book-spacious-boys-pg-in-sector-15-part.html