Danny rolls two number cubes, one red, one blue. what is the probability that he will roll a 2 one the red cube and a 6 on the blue cube?

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%)