5. True/False Exam A student takes a 20-question, true/false exam and guesses on each question. Find the probability of passing if the lowest passing grade is 15 correct out of 20. Would you consider this event likely to occur? Explain your answer. 0.021; no, it's only about a 2% chance.
5. True/False Exam A student takes a 20-question, true/false exam and guesses on each question. Find the probability of passing if the lowest passing grade is 15 correct out of 20. Would you consider this event likely to occur? Explain your answer. 0.021; no, it's only about a 2% chance.
Transcribed Image Text:5. True/False Exam A student takes a 20-question,
true/false exam and guesses on each question. Find the
probability of passing if the lowest passing grade is 15
correct out of 20. Would you consider this event likely
to occur? Explain your answer. 0.021; no, it's only about a
2% chance.
6. Multiple-Choice Exam A student takes a 20-question,
multiple-choice exam with five choices for each question
and guesses on each question. Find the probability of
guessing at least 15 out of 20 correctly. Would you
consider this event likely or unlikely to occur? Explain
your answer. 0.000; the probability is extremely small.
7. Driving to Work Alone It is reported that 77% of
workers aged 16 and over drive to work alone. Choose
8 workers at random. Find the probability that
a. All drive to work alone 0.124
b. More than one-half drive to work alone 0.912
c. Exactly 3 drive to work alone 0.017
Source: www.factfinder.census.gov
8. High School Dropouts Approximately 10.3% of
American high school students drop out of school before
graduation. Choose 10 students entering high school at
random. Find the probability that
No more than two drop out 0.925
b. At least 6 graduate 0.998
c. All 10 stay in school and graduate 0.337
а.
Source: www.infoplease.com
9. Survey on Concern for Criminals In a survey, 3 of
4 students said the courts show "too much concern" for
criminals. Find the probability that at most 3 out of 7
randomly selected students will agree with this statement.
Source: Harper's Index. 0.071
10. Labor Force Couples The percentage of couples
where both parties are in the labor force is 52.1. Choose
5 couples at random. Find the probability that
None of the couples have both persons working 0.025
b. More than 3 of the couples have both persons in the
labor force 0.215
а.
Fewer than 2 of the couples have both parties
working 0.162
с.
Source: www.bls.gov
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.
