21The probability of a customer arrival at a grocery service counter in any one second is equal to 0.1. Assume that customers arrive in a random stream, so anarrival in any one second is independent of all others. (Round your answers to four decimal places.)(a) Find the probability that the first arrival will occur during the ninth one-second interval.(b) Find the probability that the first arrival will not occur until at least the ninth one-second interval.

The provided information is as follows:The probability of a customer's arrival at a grocery service…

Answered: 21 The probability of a customer…

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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A professor of management has heard that eleven students in his class of 37 have landed an internship for the summer. Suppose he runs into two of his students in the corridor. a. Find the probability that neither of these students has landed an internship. (Round intermediate calculations to at least 4 decimal places and final answer to 4 decimal places.) b. Find the probability that both of these students have landed an internship.
attached
Graph d 16 18 20 22 24 26 28
(a) The probability that a student passes the P&S exam is 0.7. (i)Find the probability that a given student will pass the P&S exam after the third try. (ii)Find the probability that the third student who fails the P&S exam is found after the fifth student in a class of 9 students? (iii)Find the probability that at most 3 students will pass the P&S exam in a class of 7 students.
Please answer in 4 decimal places
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Sarah and Thomas are going bowling. The probability that Sarah scores more than 175 is 0.5 , and the probability that Thomas scores more than 175 is 0.1 . Their scores are independent. Round your answers to four decimal places, if necessary. (a) Find the probability that both score more than 175 . (b) Given that Thomas scores more than 175 , the probability that Sarah scores higher than Thomas is 0.4 . Find the probability that Thomas scores more than 175 and Sarah scores higher than Thomas.
None
The manager of a fast-food restaurant determines that the average time that her customers wait for service is 3.5 minutes. (a) Find the probability that a customer has to wait more than five minutes. (Round your answer to three decimal places.) (b) Find the probability that a customer is served within the first one minutes. (Round your answer to three decimal places.) X (c) The manager wants to advertise that anybody who isn't served within a certain number of minutes gets a free hamburger. But she doesn't want to give away free hamburgers to more than 2% of her customers. What should the advertisement say? (Give your answer to the nearest integer that satisfies the conditions.) "If you aren't served within minutes, you get a free hamburger."
Solve a,b

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