33. Seventy-two percent of the Math department faculty drink coffee and the rest drink tea. Sixty-five percent of thecoffee drinkers use sweetener and eighty-nine percent of the tea drinkers use sweetener. If a faculty member ischosen at random, what is the probability theya) do not use sweetener if you know they drink coffee?b) drink sweetened tea?c) drink coffee or do not use sweetener?

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Answered: 33. Seventy-two percent of the Math…

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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13) Approximately 59.4% of adults have added bleach to their laundry. Assume six adults are randomly selected. Find the probability that at most one adult have added bleach to their laundry. Round the answer to four decimals digits.
7.) The Pew Internet and American Life Project reported in 2004 that 55% of current music downloaders say they are using paid services. Consider a random sample of 18 music downloaders.a.) Find the probability that the sample contains 15 music downloaders who are usingpaid services using the formula.b.) Find the probability that the sample contains 10 or fewer music downloaders who areusing paid services using the calculator.c.) Find the probability that the sample contains 9 or more music downloaders who areusing paid services using the calculator.d.) Find the probability that the sample contains between 8 and 15, inclusive, musicdownloaders who are using paid services using the calculator.e.) Find the mean number of music downloaders who are using paid services.f.) Find the standard deviation of music downloaders who are using paid services.
64% of all students at a college still need to take another math class. If 4 students are randomly selected, find the probability that a. Exactly 2 of them need to take another math class. b. At most 2 of them need to take another math class. c. At least 2 of them need to take another math class. d. Between 2 and 3 (including 2 and 3) of them need to take another math class.
6. Purchased gum Kept the money 13 Students give 4 quarters Students given a $bill 29 11 38 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. b. Find the probability of randomly selecting a student who spent the money, given that the student was given a $1. c. Find the probability of randomly selecting a student who kept the money, given that the student was given a $1.
TF.2
33% of all college students major in STEM (Science, Technology, Engineering, and Math). If 39 college students are randomly selected, find the probability that d. Between 7 and 12 (including 7 and 12) of them major in STEM.
A bag of M&M has 6 red, 7 blue, and 2 yellow M&M's. What is the probability of randomly picking: (Round to 4 decimal places) a. A yellow? b. A blue or green? c. An orange?
48% of all violent felons in the prison system are repeat offenders. If 38 violent felons are randomly selected, find the probability that a. Exactly 17 of them are repeat offenders. b. At most 17 of them are repeat offenders. c. At least 17 of them are repeat offenders. d. Between 14 and 20 (including 14 and 20) of them are repeat offenders.
In a recent poll of female college students, 70% stated that they plan to graduate with a STEM degree. A math teacher decides to randomly sample 15 female college students. A. Find the probability that exactly 6 out of the 15 plan to graduate with a STEM degree. B. Find the probability that between 5 and 9 (inclusive) out of the 15 plan to graduate with a STEM degree. C. Find the probability that at least 7 out of the 15 plan to graduate with a STEM degree. D. Find the expected number of female college students out of the 15 that plan to graduate with a STEM degree.
5B. John packs four t shirts for a trip to the beach. If he owns nine t shirts, four of which are black, and he randomly picks which four to pack, what is the probability that he packs the four black ones?
67% of LaGuardia students are female. A random sample of 6 students is to be selected. Let the random variable X be the number of female students in a sample. a. What is the probability that out of 6 randomly selected students at most 2 are male? b. Find the average number of female students per sample if a large number of random samples of 20 students were selected.
55% of all violent felons in the prison system are repeat offenders. If 38 violent felons are randomly selected, find the probability that a. Exactly 22 of them are repeat offenders. b. At most 20 of them are repeat offenders. c. At least 20 of them are repeat offenders. d. Between 18 and 23 (including 18 and 23) of them are repeat offenders.

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