Question

A university has 29,970 students. In a random sample of 285 students, 19 speak three or more languages. Predict the number of students at the university who speak three or more languages

Answer 1

Set up a proportion.
Let x = the number of students in 29970 who speak 3 or more languages.

285/19 = 29970/x Cross multiply
285 x = 19 * 29970
285x = 569430
x = 569430/285
x = 5415 students speak 3 languages.