Respuesta :
Answer:
20C
Explanation:
Range may be defined as the difference between the largest and smallest value in the number of sets. Range is an important formula used in mathematics to find range of the different functions.
The range of the given set can be calculated by the following formula:
Range = largest number - smallest number
Range = 31C- 11C
Range = 20C.
Thus, the answer is 20C