$begingroup$ For (a), a straightforward way to have a look at is that you have reduced your likelihood Room to just the combinations that have at the very least one particular boy: If something pays for itself, it really works so nicely that it will save exactly the same amount https://pginsector14gurgaon.finance.blog/2025/07/29/clean-and-secure-girls-pg-in-sector-14-gurgaon-book-via-osmstays/