Identify all the cases where non-probability sampling is used.
selecting the first 100 students who enter a school during the day
selecting every 100 th package to be reviewed for its contents
surveying every member of a city of 100,000 people
dividing fans into groups of 100 and asking 10 people from each group
selecting 100 social media friends to answer a survey
selecting 100 numbers at random from a group of 100,000