Math 2602 A1 - A3                                                                           Homework  #4
                                            Due Tuesday , February 3 , 2004

i)    How many "words" or ordered lists of length 10 can be formed using the five symbol
      alphabet { 1 , 2 , A , B , C } ?

ii)   How many of the words in (i) have exactly one A ?

ii)   How many of the words in (i) have exactly one letter?

iii ) How many of the words in (i) have at most one A?

iv)  How many of the words in (i) have exactly one of each letter?

v)   How many of the words in (i) have 5 letters, followed by five digits?