Reba 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. Reba observed contestants' charming techniques, and kept track of how many worms surfaced.

Question

Tapping the ground Raking the ground
5-10 worms 3 5
11-20 worms 2 3
What is the probability that a randomly selected contestant charmed 5-10 worms and tried tapping the ground?
Simplify any fractions.

Answer 1

First, we calculate the total number of contestants who charmed 5-10 worms:

3 (tapping the ground) + 5 (raking the ground) = 8 contestants

Next, we calculate the number of contestants who charmed 5-10 worms and tried tapping the ground:

3 contestants

Therefore, the probability that a randomly selected contestant charmed 5-10 worms and tried tapping the ground is:

3 / 8 = 3/8 = 0.375