Case Study:
A school organized a Health Check Up Camp for its students. The weights (in kg) of the students of a class were recorded as below :

41, 40, 36, 52, 50, 48, 47, 45,
40, 41, 42, 49, 50, 51, 38, 41,
40, 45, 40, 39, 49, 51, 48, 46,
44, 50, 57, 38, 41, 51

Based on the above information, answer the following questions:

1. The range of the data is :
   (a) 20 kg
   (b) 21 kg
   (c) 22 kg
   (d) 23 kg

2. Mean weight of the data is :
   (a) 45 kg
   (b) 44.5 kg
   (c) 42.5 kg
   (d) 40.5 kg

3. Median of the data is :
   (a) 44 kg
   (b) 45 kg
   (c) 45.5 kg
   (d) 46 kg

4. One student weighing 45 kg, was absent on that day. Next day, the teacher added his name in the list. The average weight of the new group is :
   (a) 47 kg
   (b) 46.4 kg
   (c) 46 kg
   (d) 45 kg

5. The median weight of the students after adding the absentee in the list is :
   (a) 45 kg
   (b) 46 kg
   (c) 44.5 kg
   (d) 44.2 kg