Answer:
The answer id D) 24
Explanation:
To find the median, first put all of the value into number order.
15, 17, 19, 21, 23, 25, 26, 28, 28, 30
Then choose the number (or numbers) that are in the middle.
15, 17, 19, 21, 23, 25, 26, 28, 28, 30
Since there is an even number, we have to take an average of the two numbers in the middle to get the median. The average of 23 and 25 is 24.