question: Thuy Dau, Ngoc Bui, Sam Su, and Lan Voung conducted a survey as to how long customers at Lucky claimed to wait in the checkout line until their turn. Let X = time in line. Table 6.1 displays the ordered real data (in minutes): <image 1> Determine the cumulative relative frequency for waiting less than 6.1 minutes.
  Options: A: 0.62, B: 0.63, C: 0.64, D: 0.65