Question

interesting! in the first two problems, the data was \balanced\ around the number six. try the next one without finding the total or dividing. instead, think about how the numbers are balanced around the mean. find the mean of {1, 3, 5}. notice how the 1 and 5 were \balanced\ on either side of the 3: find the mean of {4, 7, 10}.

Explanation:

Step1: Observe number balance

For the set {4, 7, 10}, 4 is 3 less than 7 and 10 is 3 more than 7. The numbers are balanced around 7.

Answer:

7