Which of the following grouped frequency distribution is constructed correctly? A. Class Frequen 1 -5 18 6 - 10 13 11 - 15 21 - 11 25 26 - 30 Cla Freque ncy 1-5 18 6 - 13 10 11 - 15 3, B. 6. A task force to encourage car pooling did a study of one-way commuting distances (in miles) of workers in the downtown Dallas area. A random sample of 60 of these workers was taken. The commuting distances of the workers in the sample are given in the following grouped frequency distribution: Class limit (distance in miles) Frequency 1- 10 18 11 - 20 24 21 - 30 10 31 - 40 4 41 - 50 How many of these sample workers commute more than 20.5 miles?