Asurvey of high school juniors found that 82% of students plan on attending college. if you pick three students at random, what is the probability that at least two plan on attending college?
i know the equation is:
ncx(p)^x(q)^n-x
but i cant remember what variable means what..

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Polynomial that can be factored as (3x-4)(3x+4)

X+ y = 5 ; x - y =3 solve using linear combination