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1. A unprepared student guesses on all 20 question on test that has 4 choices on each question. If x = the number of questions

1. A unprepared student guesses on all 20 question on test that has 4 choices on each question. If x = the number of questions answered correctly on the test, calculate P(10

2. A unprepared student guesses on all 20 question on test that has 5 choices on each question. What is the probability that this student will answer at least 2 questions correctly?

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