Telephone calls enter a college switchboard on the average of two every three minutes. Theprobability that 5 or more calls arriving in a 6-minute period is equal:0.90040.5640.7150.371 Suppose X, Y are two discrete random variables with probability function given by:Y \ X|1-1-11/92/91/92/91/91/91/9Then X and Y are:IndependentDependentQuestion *The time taken by a student to finish a statistics exam can be modeled using the followingcumulative distribution function:F(x) = 1-e-0.9x, x > 0Suppose that the time taken for a student to finish the exam is constant from student tostudent.Then the mean number (to the nearest whole number) of students who will finish the examin less than 1 hour for 12 students randomly selected is equal to:None of the other optionsO 78.

According to guidelines we solve first question when given questions are different.

Answered: Telephone calls enter a college…

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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Telephone calls enter a college switchboard on the average of two every three mimutes. The probability that 5 or more calls arriving in a 6-minute period is equal: O 0.9004 O 0.564 O 0.715 O 0.371