Alula has the following quiz scores: 17, 10, 9, 14, 16, 8, 10, and 10. What must the sum of her next three quiz scores be in order to have an overall average of 14?
[17 + 10 + 9 + 14 + 16 + 8 + 10 + 10 + sum ] / 11 = 14
[ 94 + sum ] = 14 *11
94 + sum = 154
sum = 154 - 94
sum = 60
