Final answer:
To find the probability of a participant's height being more than 72 inches, we need to know the total number of participants and the number with heights greater than 72 inches.
Step-by-step explanation:
To find the probability that a randomly selected participant's height is more than 72 inches, we need to know the total number of participants in the 20-29 age group and the number of participants with heights greater than 72 inches.
Let's assume the total number of participants in the 20-29 age group is 100. If out of these 100 participants, 20 have heights greater than 72 inches, then the probability will be 20/100 = 0.2 or 20%.
Therefore, the probability that the participant's height is more than 72 inches is 20%.