(not) simple probability question

No.13634340 ViewReplyOriginalReport
In one week (7 days) you registered 3 cars in a parking lot on 3 different days, 1 car on 1 day, and 0 cars on 2 different days. All observations were registered on different days of the week.

What is the probability of seeing 0 cars in one day of the week? What is the expected number of days you will see 0 cars during a 70 day period (10 weeks)?