Radio stations in a certain country use a sequence of 5 or 6 letters as their station identification call letters. The first let
ter must beZ or K or B . Assume there are no restrictions on the remaining letters, and repetition is allowed. a) How many 5-letter station identifications are possible?
b) How many 6-letter station identifications are possible?
c) How many total station identifications are possible?
d) The identification for a randomly-chosen radio station is 5 letters in length. What is the probability that all 5 letters are different?
4 is smaller than 7. And 7 is greater than 4 so let's just say ur solving a division problem multiplication ect you always need to put the greater number first!
