Mary's Final Exam for Psychology has 10 True/False questions and 10 multiple choice questions with 4 choices for each answer. Assuming Mary randomly guesses on every question: **Write answers using 3 decimal places** a.) What's the probability that she gets at least 8 of the 10 true/false questions correct?  b.) What's the probability that she gets at least 5 of the 10 multiple choice questions correct?  c.) If the multiple choice questions had 5 choices for answers instead of 4, what's the probability that she gets at least 5 of the 10 multiple choice questions correct?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section: Chapter Questions
Problem 41CT: On a game show, a contestant is given the digits 3, 4, and 5 to arrange in the proper order to form...
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Mary's Final Exam for Psychology has 10 True/False questions and 10 multiple choice questions with 4 choices for each answer. Assuming Mary randomly guesses on every question:

**Write answers using 3 decimal places**

a.) What's the probability that she gets at least 8 of the 10 true/false questions correct? 

b.) What's the probability that she gets at least 5 of the 10 multiple choice questions correct? 

c.) If the multiple choice questions had 5 choices for answers instead of 4, what's the probability that she gets at least 5 of the 10 multiple choice questions correct? 

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