Tammy has 3 skirts and 6 blouses. how many different outfits can she make with 1 skirt and 1 blouse. no links or i will report

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%)