A test contains 10 questions and each question has 4 options to answer in with 1 being the correct answer.
What is the probability of getting at least 4 questions right if answers are randomly selected?
What is the probability of getting between 2 to 7 questions right (3,4,5,6) if answers are randomly selected?
I'm completely stranded in probability. I'm trying to get it in the P and C formats but it won't work. Help is very much appreciated.