Correct Answer - Option 2 : 65.9
Concept:
Range: It is the difference between the largest and the smallest number in the set.
Range = Largest number - smallest number
Calculation:
We have 4.1, 25.4, 23.3, 66.5, 21, 70.
Range = Largest number - smallest number
= 70 - 4.1
= 65.9