Let A be the set of people living in the world today. A binary relation R is defined on A as follows: for all p, q ÎA, p q Û p has the same first name as q. Determine whether the relation R is reflexive, symmetric and/or transitive.

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?