Consider the following Venn Diagram, which was constructed based on the data from a survey of 222 UNLV students about whether or not they had any of the three social media accounts. DATA FACEBOOK 46 24 23 23 50 INSTAGRAM 2 TWITTER 37 17 a) What is the probability that a UNLV student has a Facebook account, but not a Twitter account? (Round your answer to four decimal places before entering in the box below). b) What is the probability that a UNLV student has both Instagram AND Twitter accounts, but not a Facebook account? (Round your answer to four decimal places before entering in the box below).

According to reports, 30% of American adults have chronic insomnia. If 3 American adults are chosen at random, what is the probability that all 3 have chronic insomnia?   A) 0.90 B) 0.027 C) 0.093 D) 0.075 E) 0.8437

Seventeen of the 50 digital video recorders (DVRs) in an inventory are known to be defective. What is the probability that a randomly selected item is defective? The probability is (Type an integer or a decimal. Do not round.)

All students in a high school were surveyed about two sports. The results are shown in the graph. Frequency 600 400 200 0 190 Sports Survey 565 Basketball 340 Football Like Basketball or Football Both 100 Neither a) How many students were surveyed? b) What is the probability that a student (chosen at random) likes only basketball? Express your answer as a decimal, rounded to 2 decimal places. c) What is the probability that a student (chosen at random) likes both basketball and football? Express your answer as a percentage. d) What is the probability that a student (chosen at random) likes neither basketball nor football? Express your answer as a fraction in lowest terms.

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A Gallup poll of 1,236 adults showed that 14% believe that bad luck follows if your path is crossed by a black cat. a) Find u, o?, o, and usual values. b) Use the above information to find the probability that a total of 203 subjects believe that bad luck follows if your path is crossed by a black cat. a) Use the above information to find the probability that less than 203 subjects believe that bad luck follows if your path is crossed by a black cat.

Please Answer d). & e). Only The contingency table below shows the results of a survey of video viewing habits by age.      Video Viewing Platform Preferred     Viewer Age Mobile/Laptop Device   TV Screen   Row Total 18–34 40   23             63   35–54 12   12             24   55+ 5   8             13   Column Total 57   43             100      Find the following probabilities or percentages: (a) Probability that a viewer is aged 18–34. (Round your answer to 2 decimal places.) Probability             (b) Probability that a viewer prefers watching videos on a TV screen. (Round your answer to 2 decimal places.) Probability             (c) Percentage of viewers who are 18–34 and prefer videos on a mobile or laptop device. Percentage of viewers             % (d) Percentage of viewers given they are 18–34 who prefer videos on a mobile or laptop device. (Round your answer to 2 decimal places.) Percentage of viewers             % (e) Percentage of viewers who are 35–54…

All students in a high school were surveyed about two sports. The results are shown in the graph. Frequency 600 400 200 0 190 Sports Survey 565 Basketball 340 Football Like Basketball or Football Both 100 Neither a) How many students were surveyed? b) What is the probability that a student (chosen at random) likes only basketball? Express your answer as a decimal, rounded to 2 decimal places. c) What is the probability that a student (chosen at random) likes both basketball and football? Express your answer as a percentage. d) What is the probability that a student (chosen at random) likes neither basketball nor football? Express your answer as a fraction in lowest terms.

3. The latest data from the CDC indicates that 14% of Americans are smokers. A researcher wants to identify smokers for a survey. He randomly selects people entering a grocery store to ask if they are a smoker. a) What is the probability that he identifies the first smoker on his 5th try? b) What is the probability that he has to approach more than 8 people before finding the first smoker? c) How many people does he expect to approach before finding the first smoker?

In 2014, the percentage of the U.S. population that speak English only in the home is 78.9%. Choose 15 U.S. people at random. What is the probability that exactly one-third of them speak English only? At least one-third? What is the probability that at least 9 do not speak English in the home?