Answer:
A. 10
Step-by-step explanation:
First put the numbers in order from least to greatest then find the two numbers in the center of that since there is an even number of numbers there will be two the add and divide by two and you get 10.
1,2,7,9,11,15,19,20
9+11=20
20/2=10
Answer:
10
Step-by-step explanation:
You line them up from least to greatest, and get rid of one from the left side and then the right side. You do this until there is either one number remaining. If there is two numbers remaining, add them together and divide them by 2.
