Look at the given data & calculate the average of each students data,
1) 66, 66.5, 68.5, 67
Average =

=
67 CORRECT
2)
67.5 64.0 70.5 67.3
Average =
= 67.3 CORRECT
3) 60.3 60.5 60.5 61.0
Average =
= 60.43 INCORRECT
4) 55.0 58.0 59.0 57.3
Average =
= 57.3 CORRECT
Therefore, 3. Student 3 is the correct answer.