Final answer:
The probability that the next person will purchase no more than one costume is approximately 0.97.
Step-by-step explanation:
To find the probability that the next person will purchase no more than one costume, we need to calculate the ratio of the number of visitors who purchased either zero or one costume to the total number of visitors. First, we sum up the number of visitors who purchased zero or one costume: 144 + 182 = 326.
Next, we calculate the total number of visitors: 144 + 182 + 9 = 335. Finally, we divide the number of visitors who purchased zero or one costume (326) by the total number of visitors (335) and express it as a decimal to the nearest hundredth:
326 / 335 ≈ 0.97