Answer
P(primarily drives a car or takes public transportation to work) $=0.915$
Work Step by Step
The events "a worker primarily drives a car to work" and "a worker primarily takes public transportation to work" are mutually exclusives. So:
P(primarily drives a car or takes public transportation to work) = P(primarily drives a car to work) + P(primarily takes public transportation to work) =
$0.867+0.048=0.915.$
