00 students sat a mathematics test. The mean mark was found to be 60 and the standard deviation 5. Assume that the marks are normally distributed. a) what is the probability that a student got less than 50%. b) How many students got marks in the range 60-65? c) You want 400 students to pass, what would be your past mark?

00 students sat a mathematics test. The mean mark was found to be 60 and the standard deviation 5. Assume that the marks are normally distributed. a) what is the probability that a student got less than 50%. b) How many students got marks in the range 60-65? c) You want 400 students to pass, what would be your past mark?

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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