Question

Lillian 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. Lillian observed contestants' charming techniques, and kept track of how many worms surfaced. 5-10 worms 11-20 worms 5 Tapping the ground 6 16 2 Raking the ground 12 4 Poking small holes in the ground Singing into the ground 12 14 What is the probability that a randomly selected contestant tried singing into the ground and did not charm 5-10 worms? Simplify any fractions.

Answer 1

We will proceed as follows:

*Since we can see that singing into the ground got 5-10 worms 12 times and 11 - 20 worms 14 times, we have that the total is 26 times that singing to the ground worked.

Now, we write the probability using this information:

$p=\frac{14}{26}\Rightarrow p=\frac{7}{13}$