Find the median of first nine even natural numbers

10.

Step-by-step explanation:

They are:

2 4 6 8 10 12 14 16 18

The median is the middle number - in this case that is the 5th number.

The median = 10.

11

Step-by-step explanation:

First Nine even natural numbers:

2,4,6,8,10,12,14,16,18

so start deleting from both sides

you have 10 and 12 left

take the mean of the two

you have 11