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skyemichellec
27.12.2019 •
Mathematics
Arecent census at a major university revealed that 40% of its students mainly used macintosh computers (macs). the rest mainly used pcs. at the time of the census, 67% of the school's students were undergraduates. the rest were graduate students. in the census, 23% of the respondents were graduate students who said that they used pcs as their primary computers. suppose we select a student at random from among those who were part of the census and learn that the student mainly uses a pc. find the probability that this person is a graduate student. show your work.
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Ответ:
0.25
Step-by-step explanation:
40% of the students use mac computer
67% of the students are undergraduate
23% of the students are graduates and use mainly PC
Students that use PC computers = 100 -40 = 60%
Students that are graduates = 100 - 67 = 33%
Students that are graduates that use Mac = 33 - 23= 10%
Students that are undergraduate that use PC = 67 - 30 = 37%
Using conditional probability
Pr(B|A) = Pr(A and B) / Pr(A)
Pr(Graduate | mac) = Pr(graduate and mac) / Pr(mac)
= 10%/ 40%
= 1/4
= 0.25
Ответ:
n31cm
Step-by-step explanation: