A multiple-choice test contains 25 questions, each with four answers. Assume that a student just guesses on each question. What is the probability that the student answers more than 21 questions correctly? Let X denote the number of questions answered correctly. D a. 5.762 x 10-11 O b.9.100 x 10-10 O c. None among the choices O d.9.677 x 10-10

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