Sixty people are in line for a show. Starting with the 1st person, you ask every 5th person if they bought their ticket in advance. Nine people say yes. Based on the sample, how many people bought tickets in advance?

9 bought in advance

3 did not buy in advance

Step-by-step explanation:

Number of people in line = 60

The total number of people surveyed :

Every 5th person in line is questioned starting with the first in line :

Number of people sampled:

1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56

Total sampled from the 60 people in line = 12

If 9 people said yes ;

Then ;

9 people bought tickets in advance and ;

12 - 9 = 3 did not

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