A student takes a multiple-choice test that has 10 questions. Each question has four choices. The student guesses randomly at ea
ch answer. Let X be the number of questions the student gets correct. (a) Find P(X = 3). (b) Find P(X > 2). (c) To pass the test, the student must answer 7 or more questions correctly. Would it be unusual for the student to pass? Explain.