The ratio of the number of women to the number of men to the number of children in a room is 5: 2: 7, respectively. what is the total number of people in the room? (1) the total number of women and children in the room is 12.(2) there are fewer than 4 men in the room.

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%)