Use the proportion to find the missing dimension of the original rectangle.

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

Ithink i know it but i want to be sure so can you me out ?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0