Answered: a) Suppose that the average number of…

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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Question

a) Suppose that the average number of inquiries received by a customer service center of a IT company is 50 in 5 minutes interval. Find the probability that no inquiries received in a 1-minute period.

b) 80% of the students in Discrete Mathematics class prefer chocolate flavored ice cream. If a random sample of 10 students is selected, what is the probability that at least 8 students prefer chocolate flavored ice cream.

c) The assessment test score of Discrete Mathematics follows normal distribution with a mean of 70 and a standard deviation of 10. Find the probability that Jess scored a mark between 75 and 78.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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