$begingroup$ For (a), an easy way to have a look at is that you have lowered your chance House to just the mixtures that have no less than 1 boy: If anything pays for alone, it works so nicely that it will save a similar amount of cash that it https://boyspggurgaonsector15.family.blog/2025/07/29/trusted-girls-pg-in-gurgaon-sector-15-with-study-first-environment/