My math teacher, Mr. Numeric, went to the auto show last weekend. made the mistake of asking him what he saw, Here was his response: "I'm glad you asked! I made several interesting observations. As you might have guessed, every red car was a sports car, but I found it odd that half of all the blue cars were sports cars. Interestingly, a salesman told me that half of all the sports cars there were red. I counted 40 blue cars and 30 red cars. Now, can you tell me how many sports cars were neither blue nor red?"