A student's test score T is an integer between 0 and 100 corresponding to the experimental outcomes s0, ..., s100. A score of 90 to 100 is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and below 60 is a failing grade of F. If all scores between 51 and 100 are equally likely and a score of 50 or less never occurs, find the following probabilities:
P[C or better]