To find the probability that the next person will purchase more than one costume, we first need to determine the total number of visitors who purchased costumes.
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Total visitors:
- Visitors who purchased no costume: 171
- Visitors who purchased exactly one costume: 148
- Visitors who purchased more than one costume: 34
To find the total number of visitors, we sum these three groups:
\[ \text{Total visitors} = 171 + 148 + 34 = 353 \]
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Calculating the probability: We need to find the probability that the next visitor will purchase more than one costume. This can be found using the formula:
\[ P(\text{more than one costume}) = \frac{\text{Number of visitors who purchased more than one costume}}{\text{Total number of visitors}} \]
Substituting in the values:
\[ P(\text{more than one costume}) = \frac{34}{353} \]
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Simplifying the fraction: We need to check if the fraction \( \frac{34}{353} \) can be simplified. We look for the greatest common divisor (GCD) of 34 and 353:
- The prime factorization of 34 is \( 2 \times 17 \).
- The number 353 is a prime number and not divisible by either 2 or 17.
Since 34 and 353 share no common factors (other than 1), the fraction \( \frac{34}{353} \) is already in its simplest form.
Thus, the probability that the next person will purchase more than one costume is:
\[ \boxed{\frac{34}{353}} \]