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3 years ago

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A university has 28,980 students. In a random sample of 180 students, 12 speak three or more languages. Predict the number of st

udents at the university who speak three or more languages. The expected number of students at the university who speak three or more languages is .

1 answer:

anygoal [31]3 years ago

5 0

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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Part a

We can see the figure attached is a illustration for the problem on this case.

Part b

For this case we can use the sin law to find the value of r first like this:

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