A student takes a multiple choice test consisting of 5 questions where there are 4 choices per question. Also, each question is worth 20 points. Suppose the student guesses on each question. Let X be the number of questions the student gets correct. The probability distribution for X is given below. Find the mean score a student that guesses will receive on the test. Do not give units. Hint: X represents the number of questions the students get correct. This is not the same as the score they get on the test.