In a survey of 1000 adults conducted in 2012, the following question was asked: Will humans walk on Mars in the next 25 years? The results of the survey are summarized in the following table. Answer Very likely Somewhat likely Not very likely Not at all likely Not sure Respondents 210 270 340 90 90 If a respondent in the survey is chosen at random, what is the probability that he or she answered with the following? (a) It is very likely or somewhat likely that humans will walk on Mars in the next 25 years.   (b) It is not very likely or not at all likely that humans will walk on Mars in the next 25 years.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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In a survey of 1000 adults conducted in 2012, the following question was asked: Will humans walk on Mars in the next 25 years? The results of the survey are summarized in the following table.

Answer Very
likely
Somewhat
likely
Not very
likely
Not at all
likely
Not sure
Respondents 210 270 340 90 90

If a respondent in the survey is chosen at random, what is the probability that he or she answered with the following?

(a) It is very likely or somewhat likely that humans will walk on Mars in the next 25 years.
 

(b) It is not very likely or not at all likely that humans will walk on Mars in the next 25 years.
 
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