Alvin hosted a party. His guests could choose spaghetti with meatballs or spaghetti without meatballs as their entrée; broccoli or a salad as their side; and lemonade, tea, punch, or water as their beverage. Everyone selected an entrée, side, and beverage. Alvin ran out of broccoli and punch. What is the difference in the probability of someone selecting spaghetti without meatballs, a salad, and tea after he ran out of the broccoli and punch than before he ran out? Justify your response.