Milt had the following electric bills: June, $46.23; July, $57.87;
August, $63.45. What is his average monthly expense for electricity?
a. $167.55
b. $62.85
c. $55.85
d. $223.40
To find the average monthly expense, we need to add up the three bills and divide by three:
$(46.23 + 57.87 + 63.45)/3 = 55.85$
So the answer is (c) $55.85.