Rock's transportation expenditures for three months were $59.85, $136,
and $75. What is his average monthly expense for transportation?
a. $90.28
b. $270.85
c. $75
d. $175.40
To find the average monthly expense for transportation, we need to add up the expenditures for three months and then divide by three (the number of months).
$59.85 + $136 + $75 = $270.85
$270.85 รท 3 = $90.28
Therefore, the answer is (a) $90.28.