Find mean and median of the following data 45, 25, 20, 30, 54, 33, 30, 20, 21

Here, put the series in increasing order :
20, 20, 21, 25, 30, 30, 33, 45, 54

Now, as the series contains 9 numbers, median would be 5th number which is 30.

Mean = 20 + 20 + 21 + 25 + 30 + 30 + 33 + 45 + 54 / 9 = 30.89

In short, Your Median = 30, Mean = 30.89

Hope this helps!

Theirhgghh

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.