Anna's mom makes 3 sandwiches every school day. each sandwich gets 3 slices of cheese. how many sliced of cheese will anna's mom need for all the sandwiches she makes on 2 school days?

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?