What is the probability that the student will be a freshman

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An upper-level sociology class has 120 registered students: 37 seniors, 50 juniors, 23 sophomores, and 10 freshmen.

A) Imagine that you choose one random student from the classroom (perhaps by using a random number table). What is the probability that the student will be a junior?

B) What is the probability that the student will be a freshman?

C) If you are asked to select a proportionate stratified sample of size 30 from the classroom, stratified by class level (senior, junior, etc.). How many students from each group will there be in the sample?

Reference no: EM132848137

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