PLZ HELP ASAP IM IN THE TEST ON STUDY ISLAND
Bernice wants to know which ice cream parlor is the most popular among students at her school. Which samples are random for this population and which are not?

OPTIONS
Plz just say 1. random or not or number 2 etc...
1.Four people from each of Bernices classes
2.Every 5th person that walks by the school library
3.Two people from each class during fourth period at Bernice school
4. Every third girl that walks by the cafeteria
5.Every sixth person at bernices favorite ice-cream place

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.