Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc The Relative Frequency of the First Class Interval Is _________

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system and orders an inspection of "each and every payroll voucher issued since January 1, 2000." Each payroll voucher was inspected and the following frequency distribution was compiled. $\begin{array}{c}\begin{array}{c}\text { Errors per Voucher}\\\text { 0 -under 2}\\\text { 2-under 4}\\\text { 4-under 6}\\\text { 6-under 8}\\\text { 8-under 10}\end{array}\begin{array}{c}\text {Number of Vouchers}\\500 \\400 \\300 \\200 \\100\end{array}\end{array}$

The relative frequency of the first class interval is _________.

A) 0.50
B) 0.33
C) 0.40
D) 0.27
E) 0.67