A class contains 8 mathmeticians, 7 scientists, and 2 artists. 3 students are picked from the class to take part in a school trip. Find the probability that none of them are scientists and find the probability that they are all in the same profession.

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

answer: (3,11) is your answer.

the awnser is visionary

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0