kellycandia2003 kellycandia2003

07-03-2017
Mathematics

contestada

A university has 28,980 students. In a random sample of 180 students, 12 speak three or more languages. Predict the number of students at the university who speak three or more languages. The expected number of students at the university who speak three or more languages is .

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Cellow111 Cellow111

17-03-2017

Word | know | Unknown
Language| 12 | x
Total | 180 | 28980
Use cross multiply:
12(28980) = 180(x)
347760 = 180x
347760/180=1932

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