A midwestern music competition awarded 34 ribbons. The number of blue ribbons awarded was 1 less than the number of white ribbons. The numbers of red ribbons was 2 more than the number of white ribbons. How many of each kind of ribbon was awarded?​

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%)

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.

What is the mean of the data set 125, 141, 213, 155, 281