Question 259769
A student wrote 69 as the average of the data: 70, 59, 72, 35, 67, 78, 68, 81, 80, and 76. That answer was wrong by

sum of 70, 59, 72,
       35, 67, 78, 
       68, 81, 80, and 76 equals 686

686/10=68.6
wrong by 0.4