survey of grocery stores in the Southeast revealed 40% had a pharmacy, 50% had a floral sh
op, and 70% had a deli. Suppose 10% of the stores have all three departments, 30% have both a pharmacy and a deli, 25% have both a floral shop and deli, and 20% have both a pharmacy and floral shop. a. What is the probability of selecting a store at random and finding it has both a pharmacy and a floral shop?