The range of the data: 21,6,17,18,12,8,4,13 is
17
12
8
15
Explanation for the correct option:
Option (A). 17
The given data is
21,6,17,18,12,8,4,13
Here the maximum value of the data is 21
The minimum value of the data is 4
Now,
range=maximumvalue-minimumvalue=21-4=17
Hence, the correct option is A.
Prove that:(i) 13+√7+1√7+√5+1√5+√3+1√3+1=1(ii) 11+√2+1√2+√3+1√3+√4+1√4+√5+1√5+√6+1√6+√7+1√7+√8+1√8+√9=2