Solve for x (please help i dont know how to this one ;-;)

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

How do you write 600 as a product of its prime factors (index! )