Answer in fraction form = 3/8
Answer in decimal form = 0.375
Answer in percent form = 37.5%
Step-by-step explanation:
Look at the "outcomes" column. We're looking for either THH, HTH, or HHT. This represents getting two heads and a tail. The order doesn't matter. Count out the number of THH, HTH or HHT and you should count out 3 total. The other combos have either all heads or more tails than heads.
We have 3 ways to get what we want (THH, HTH or HHT) out of 8 outcomes overall. So 3/8 = 0.375 = 37.5% is the probability we want.
Side info: Notice how each coin has 2 outcomes (H or T) and having 3 coins has 2^3 = 8 outcomes.