A multiple choice examination has 20 questions. One point is awarded for each correct answer and 0.2 points deducted for each incorrect answer. The chance that a student attempts an answer to each question is 0.9 with questions being independent of one another. Experience also shows that if a student attempts a question, they will get the correct answer with probability 0.8. (a) Find the probability that a randomly selected student attempts y questions.

A multiple choice examination has 20 questions. One point is awarded for each correct answer and 0.2 points deducted for each incorrect answer. The chance that a student attempts an answer to each question is 0.9 with questions being independent of one another. Experience also shows that if a student attempts a question, they will get the correct answer with probability 0.8. (a) Find the probability that a randomly selected student attempts y questions.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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