A fitness center records the number of minutes spent on treadmills by $30$ different members in a month. The data are:
$32$, $41$, $38$, $45$, $50$, $36$, $39$, $44$, $37$, $42$, $47$, $35$, $49$, $40$, $43$, $34$, $33$, $48$, $46$, $41$, $36$, $37$, $44$, $38$, $40$, $39$, $45$, $46$, $42$, $43$.
Based on a relative frequency distribution with $8$ classes, what is the relative frequency for the class interval $41\text{–}43$?

• A. $0.25$
• B. $0.30$
• C. $0.20$
• D. $0.45$

Answer: (C)