Question

Given that every tenth person in line will get a coupon for a free box of popcorn at the movies what is the probability that you don't get a coupon when your in line

Answer 1

SOLUTION:

Step 1:

In this question, we are given the following:

Given that every tenth person in line will get a coupon for a free box of popcorn at the movies.

We are meant to find the probability that you don't get a coupon when you are in the line.

Step 2:

We can see that the probability that the person was in the line and got a coupon is:

$\frac{1}{10}$

Then, the probability that the person did not get a coupon when he was in the line is:

$(\text{ 1 -}\frac{1}{10})\text{ = }\frac{9}{10}$