Probabilistic math problem! Urgent! Seek the integrity of the process. Teacher Zhang showed the words "20", "14", "senior high school entrance examination" and "sprint" in class when reviewing the probability content for the students. Apply the inverse solution.

P (entertainment group) = 1-P (beauty group)

Beautiful combination requires that "20" and "14" are continuous and orderly, at the beginning or end of a sentence.

So p (beautiful combination) = c (3 3,2 2) * a (2 2,2)/a (4,4) =1/4.

So p (entertainment combination) = 1- 1/4=3/4.

You can ask questions if you can't understand the arrangement and combination.