Average Problems Practice Test

A student tracks allowance for four weeks: $10, $15, $12, and $13. The student adds them as $10+$15+$12+$13 to get the total. Next, the student divides by 4 because there are four weeks. The result is the average allowance each week. Find the average allowance received.

A teacher lists five quiz scores for a small group: 78, 85, 92, 88, and 81. The teacher finds the sum of all five scores. Next, the teacher divides the sum by 5 to get the mean. The students want the single number that represents their average. What is the average of the given numbers?