box contains ten cards labeled Q, R ,S ,T , U, V, W, X, Y, andZ . One card will be randomly chosen. What is the probability of choosing a letter from Q to T? Write your answer as a fraction in simplest form.

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)