What is the probability that a student will answer at least two questions correctly by random guessing on an exam with 8 multiple-choice questions each of which as three options?

What I don't get is the at least two questions correctly part. Do they mean P(2) + P(3) + P(4) +P(5) + P(6) + P(7) + (P8)?

P(2) means 8C2 x (1/3)^2(2/3)^6 and ect....