What is the probability that none of them are sophomores

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Question: Your Stats class has N = 40 students, and r = 15 students are sophomores. You don't know anyone, but you randomly selected n = 12 of them and checked if they are sophomores. For the following questions explain your formulas.

a. What is the probability that none of them are sophomores?

b. What is the probability that 3 of them are sophomores?

c. What is the probability that no more than 3 students are sophomores?

 

Reference no: EM133381843

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