Ve won a new prize! Meg attended her town's annual Worm Charming Competition. Contestants are assigned to a
square foot of land, where they have 30 minutes to "charm" worms to the surface of the dirt
using a single technique. Meg observed contestants' charming techniques, and kept track of
how many worms surfaced.
The probability that a contestant tried poking small holes in the ground is 0.4, the probability
that a contestant charmed 5-10 worms is 0.4, and the probability that a contestant tried
poking small holes in the ground and charmed 5-10 worms is 0.2.
What is the probability that a randomly chosen contestant tried poking small holes in the
ground or charmed 5-10 worms?