A student takes a 20-question, true/false exam and guessed on each question
Homework Answers
Prob. of 15 = .5^15...
Prob. of 20 = .5^20
Either-or probability = sum of individual probabilities.
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A student takes a 20-question, true/false exam and guessed on each question
A student takes a true-false test consisting of 15 questions. Assume that the student guesses at...
A student takes a true-false test consisting of 15 questions. Assume that the student guesses at each question and find the probability that a. the student gets at least one question correct. b. the student gets a 80 % or better on the exam.
2. A professor gives a twenty question true/false quiz. The lowest passing quiz score is 12...
2. A professor gives a twenty question true/false quiz. The lowest passing quiz score is 12 correct out of 20. Suppose a student randomly and independently guesses on each quiz question, what is the probability that the student earns a passing grade? Round to 4 decimal places.
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer....
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 40% of the questions correct. (Round your answer to three decimal places.)
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer....
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 60% of the questions correct. (Round your answer to three decimal places.)
A student takes an exam containing 18 true or false questions. If the student guesses, what...
A student takes an exam containing 18 true or false questions. If the student guesses, what is the probability that he will get exactly 15 questions right? Round your answer to four decimal places.
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A history professor decides to give a 15-question true-false quiz. She wants to choose the passing grade such that the probability of passing a student who guesses onevery question is less than 0.10. What score should be set as the lowest passing grade?
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A student takes an exam containing 11 11 true or false questions. If the student guesses, what is the probability that he will get exactly 3 3 questions right? Round your answer to four decimal places.
A student takes an exam containing 18 true or false questions. If the student guesses, what...
A student takes an exam containing 18 true or false questions. If the student guesses, what is the probability that he will get less than 10 but more than 7 questions right? Round your answer to four decimal places.
A student takes an exam containing 18 true or false questions. If the student guesses, what...
A student takes an exam containing 18 true or false questions. If the student guesses, what is the probability that he will get less than 10 but more than 7 questions right? Round your answer to four decimal places.
2. A professor gives a twenty question true/false quiz. The lowest passing quiz score is 12 correct out of 20. Suppose a student randomly and independently guesses on each quiz question, what is the probability that the student earns a passing grade? Round to 4 decimal places.
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