Hello, Jonas8000!

A lot of bikes are parked in front of a university.

A truck unfortunately hits 10 bikes and destroy them.

Of the students at the university: 20% are smoker, 40% are bikers, 25 % of the bikers are smokers.

What is the probability that none of the 10 bikes belongs to the smokers??

We can place the given information in a chart.

We can supply the missing information.

Now you can answer the question.