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 12:40
Question 6 (10 points) ✓ saved what is the center of a circle described by the equation x2 + y2 +10y = -16? . (0,-5) (0,5) (-5,0) (5,0)
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Mathematics, 21.06.2019 18:30
Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?
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Mathematics, 21.06.2019 19:00
Which graph represents the parent function of y=(x+2)(x-2)
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Mathematics, 21.06.2019 20:30
For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.
Answers: 1
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