In a class of 7, there are 2 students who are martial arts masters. If the teacher chooses 2 students, what is the probability that both of them are martial arts masters?

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

41*67/2=1373.5

step-by-step explanation:

i just used a calculator