DISCRETE MATHMATICS (d)At the end of each year, students at EZ School received ribbons at a school-wide awards ceremony. This year, 120 students receive gold stars for perfectattendance, 180 receive certificates for participating in the science fair and 80students receive blue ribbons for outstanding grades. Of these, 40 students whoreceive the attendance star receive no other award, 50 students who receive thescience fair certificate receive no other award, and 10 students receive the blueribbon receive no other award. In addition, 10 students receive all three awardsand 65 students receive no awards.(i)Illustrate this situation by a Venn diagram.(ii)Compute how many students attend the school this year.

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Answered: At the end of each year, students at EZ…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question 19 Lucille, Rocio, and Cristina are all taking College Mathematics but from different professors. They all recently took a statistics exam and the exam scores were normally distributed in each of their classes. • Lucille's class had an average grade of 77 and the standard deviation was 4. Lucille earned 84.2 on the exam. Rocio's class had an average grade of 85 and the standard deviation was 3. Rocio earned 85.6 on the exam. Cristina's class had an average grade of 85 and the standard deviation was 5. Cristina earned 91.5 on the exam. Since some professors give harder exams than others, these students decided to use statistics to figure out who did the best on their exam. Use the Cumulative Z-Score Table to answer the following questions. Write your answers as a percent with two decimal places. Hint • Lucille's score places her above % of her class. % of her class. Rocio's score places her above % of her class. • Cristina's score places her above Which person has the highest…

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