If the average of 5k and 3l is equal to 50% of 6l, what is the value of k/l ?

This semester, Mary had five quizzes that were each worth 10% of her grade. She scored 89, 74, 84, 92, and 90 on those five quizzes. Mary also scored a 92 on her midterm that was worth 25% of her grade, and a 91 on her final that was also worth 25% of her class grade. What was Mary's final grade in the class?

A police officer walked into a room full of suspects and turn out their pockets. The chart below shows the number of coins each man had.

The police claim the man with the amount of money closest to the arithmetic mean of the group is guilty. Who is it?

If Mary traveled 116 miles on day 1, 130 miles on day 2, 114 miles on day 3. How many miles per day did she average?

The mean of 12, 14, 18, 20, and x is equal to 14. Solve for x.

On her first four math tests, Kelly earned scores of 75, 85, 92, and 80. What must she score on the fifth test to make her class average 84?

A, B, C, D, and E are integers such that A < B < C < D < E. If B is the average of A and C, and D is the average of C and E, what is the average of B and D?

This semester, Mary had five quizzes that were each worth 10% of her grade. She scored 89, 74, 84, 92, and 90 on those five quizzes. Mary also scored a 92 on her midterm that was worth 25% of her grade, and a 91 on her final that was also worth 25% of her class grade. What was Mary's final grade in the class?

The mean of a series of 6 numbers (11, 12, 14, 17, 18, x) is 15. Solve for x.

What is the average (mean) of