Aresearch company surveys 8,000 people.
the company expects 6,000 people to
respond favorably. if there is a percent
error of 2.5%, what is the range of
people who will respond favorably to the
survey?

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%)