2. In a class, 15% of the students is expected to fail. Examination marks areroughly distributed, with a mean of 72 and a standard deviation of 6.a. What mark must a student make to pass?b. What percent of the class is included between marks 75 and 80?c. What is the probability of getting a mark higher than 80?d. Within what two marks can we expect the middle 95% of the cases tobe included?e.What two marks are so extreme that only 1% of the class is expected tofall beyond them?

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Answered: 2. In a class, 15% of the students is…

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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Can you please answer parts c and d of the attached question. Thank you.
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