Concept:The range of a data set is the difference between the highest and lowest values.Explanation:The given numbers are 28,29,39,38,33,37,26,20,15,25.The maximum value is 39.The minimum value is 15.Range is calculated as: Range=Maximum−Minimum.So, Range=39−15.Thus, Range=24.Answer:The range is 24, which is option B.