One list of 100 numbers contains 20% ones and 80% twos. A second list of 100 numbers contains 50% threes and 50% fives. A third list is obtained by taking each number in the first list and adding the corresponding number in the second list.
a) What is the average of the third list? Or is this not determined by the information given?
Repeat a) with adding replaced by b) subtracting c) multiplying by d) dividing by.