Question: A student takes a truefalse test that has 10 questions and guesses randomly at each answer. Let X be the number of questions answered correctly.

A student takes a true–false test that has 10 questions and guesses randomly at each answer. Let X be the number of questions answered correctly.

a. Find P(4).

b. Find P(Fewer than 3).

c. To pass the test, the student must answer 7 or more questions correctly. Would it be unusual for the student to pass? Explain.

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