Mathematics, 06.03.2020 23:37 nickname0097
A multiple-choice quiz has 20 questions. Each question has five possible answers, of which only one is correct. A) What is the probability that sheer guesswork will yield at least 10 correct answers? B) What is the expected number of correct answers by sheer guesswork? C) Suppose 5 points are awarded for a correctly answered question. How many points should be deducted for an incorrectly answered question, so that for a student guessing randomly, the expected score on a question is zero? (Most standardized tests use this method to set penalties for guessing). D) If a student is able to correctly eliminate one option as a possible correct answer but is still guessing randomly, what happens to his/her expected score for that question? Use your answer to C) as the number of points being deducted for an incorrect answer. E) If a student is able to correctly eliminate two options as possible correct answers but is still guessing randomly, what happens to his/her expected score for that question? Use your answer to C) as the number of points being deducted for an incorrect answer.
Answers: 3
Mathematics, 21.06.2019 17:50
Which of these triangle pairs can be mapped to each other using two reflections?
Answers: 1
Mathematics, 21.06.2019 20:30
Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.
Answers: 1
Mathematics, 21.06.2019 20:30
Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2
Answers: 2
Mathematics, 21.06.2019 21:00
The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length
Answers: 2
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