Question: 1. At Bakery Patitsa (in Bulgaria), there are 25 pies available: 10 contain blueberries, 15 contain peaches, and 5 are blueberry-peach pies. The only other offering at Bakery Patitsa is chocolate mousse pies. How many fruit pies are available? How many chocolate mousse pies are available?
2. Let's borify: If we have A ⊂ Q and B ⊂ Q, and you are given the values of |A|,|B|, and |A ∩ B|, then how can you determine |A ∪ B|? How about |Q \ (A∪B)|?