To get people to buy more of their product, a company advertises that in selected boxes of their popsicles is a super hero trading card. There is a
3
8
chance of getting a trading
card in a box. What is the probability that there will not be a trading card in the box of

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling