The enrollment of a school during six consecutive years was as follows:

1620, 2060, 2540, 3250, 3500, 3710.

Find the mean enrollment.

Mean (M) = $\dfrac{\text{Sum of enrollments}}{\text{No. of years}}$

Sum of enrollments = 1620 + 2060 + 2540 + 3250 + 3500 + 3710 = 16680

$M = \dfrac{16680}{6} = 2780.$

Hence, the mean enrollment = 2780.