A person conducts a survey at a local mall and obtained the following results:

A person conducts a survey at a local mall and obtained the following results: 58 people use microwave ovens; 63 use electric ranges; 58 use gas ranges; 19 use microwave ovens and electric ranges; 17 use microwave ovens and gas ranges; 4 use both gas and electric ranges; 1 uses all three; 2 use none of the three; a. How many people were interviewed? B. How many use only microwave ovens? C. How many do not use a microwave oven? A card is drawn from a well-shuffled deck of 52 cards. What is the probability of each of the following: a. A black card? C. An ace or a ten? Two cards are drawn (without replacement) from an ordinary deck. A. What is the probability that the second is a heart, given that the first was a heart? B. What is the probability that the cards were an ace and a ten?