Question 1118470
mean=total/n
9=total/10
total is 90
remove 1 score with a 0, total is still 90, and now there are 9 scores.  The mean is now 10.

2)
16=total/8, so total is 128
remove 1 score and 15=total/7
The total is now 105.  The score that was removed was a 23.