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Binomial probability

10. A professor is giving a T/F test in your history class. Statistics show students who do not study for the test but attend class have a 70% chance of getting the answers correct. The test is 20 questions and the student did not study. (Hint: Binomial Distribution)

a. What are the odds a student gets more than 13 questions correct?
b. What are the odds a student gets exactly 17 questions correct?
c. What are the odds a student gets an A (19 or 20 questions correct)?
d. What are the odds the student gets a D or E (less than 14 questions correct)?
e. If the probability of a student getting an answer correct on the same 20 question test falls to 62% What are the odds a student gets exactly 13 questions correct? (Hint - Use Formula)

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Binomial Distribution
A professor is giving a T/F test in your history class. Statistics show students who do not study for the test but attend class have a 70% chance of getting the answers correct. The test is 20 questions and the student did not study. (Hint: Binomial Distribution)

Answer
Let X be the number of correct answers. Clearly X is binomial with n =20 and p = 0.70. The probability ...

Solution Summary

The solution provides step-by-step method for the calculation of binomial probability. Formula for the calculation and Interpretations of the results are also included.

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