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I have attached a document that is for extra credit in my statistics class I have no idea how to do any of these

a) Here, n=10, p=1/4=0.25, q=1-p=0.75
To pass the quiz student has to answer 8 correct options.
Probability the student will pass the quiz C (10,8)(0.25)8 (0.75) 2 0.0004…
Statistics and Probability