Three countries (the Land of Fire, the Land of Wind, and the Land of Earth) each make a 3 person team. Each team consists of three ninjas, each of a different rank: one genin (junior ninja), one ch¯unin (journeyman ninja), and one j¯onin (elite ninja).
(a) If a ninja is chosen at random from each of the three different countries, what is the probability of selecting a complete team
(A complete team here is a group consisting of three ninjas, each ninja of a different rank).
b) If a ninja is chosen at random from each of the three different countries, what is the probability that all 3 ninjas selected have the same rank?
