The results of a survey asking 100 people how they get their news.
15 From newspapers;
25 From television;
40 From both newspapers & Television
and 20 from no sources;
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What is the probability that a person selected at random from this survey does NOT claim television as a source of getting the news?
65 people (25 + 40) cite television as a news source
so 35 out of 100 people do NOT claim TV as a source
To calculate the probability that a person selected at random from the survey does not claim television as a source of getting news, we need to find the number of people who do not claim television as a source and divide it by the total number of people in the survey.
From the given information, we know that:
- 15 people get news from newspapers only
- 40 people get news from both newspapers and television
- 20 people get news from no sources
To find the number of people who do not claim television as a source, we need to subtract the people who get news from both newspapers and television (40) and the people who get news from no sources (20) from the total number of people in the survey (100):
Total number of people who do not claim television as a source = 100 - 40 - 20 = 40
Therefore, the probability that a person selected at random from this survey does not claim television as a source of getting news is:
Probability = (Number of people who do not claim television as a source) / (Total number of people in the survey)
= 40 / 100
= 0.4
= 40%
So, the probability is 0.4 or 40%.