4. (C1) Arizona license plates are designed so there are three letters followed by four
digits. How many different license plates
are possible?
A. 175,760,000
B. 47,174,400
C. 78,524,000
D. 115,316,136

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%)