Respuesta :
Answer:
We know that every 15th person gets a free box of popcorn.
This depends on order, but nobody knows what is his actual position, so we can assume that:
of 15 people, 1 will get a free box of popcorn.
Then the probability of getting free popcorn is:
1/15
And the negation, (the probability of not getting a free box) is:
1 - 1/15 = 14/15 = 0.93...
The probability of not getting a free box is, [tex]\frac{14}{15}[/tex]
Probability :
Given that, from 15 people, 1 will get a free box of popcorn.
Then the probability of getting free popcorn is:
                 [tex]P(E)=\frac{1}{15}[/tex]
the probability of not getting a free box is,
      [tex]P=1-P(E)\\\\P=1-\frac{1}{15}=\frac{14}{15}[/tex]
Learn more about the probability here:
https://brainly.com/question/25870256