At his birthday party, Aiden collected 15% of the candy that fell out of the pinata. If Aiden collected 6 pieces of candy, how many pieces of candy fell out of the pinata? pls help its today

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%)