Answer: 34.5
Step-by-step explanation:
<u>First</u>, write out all of the numbers from least to greatest.
which is (18,20,26,34,34,35,38,40,42,45)
<u>Second</u>, choose the number in the middle of the set of numbers you wrote out from least to greatest. (There are TWO numbers in this case, which are 34 and 35)
<u>Lastly</u>, since there are two numbers you add them both together and then divide by 2. (34+35=69 , 69 divided by 2 = 34.5)