Directions : Questions are Assertion- Reason type questions. Each of these questions contains two statements :
Statement- 1 (Assertion) and Statement - 2 (Reason).
Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select the correct choice.
Question :
Statement-1 : The variance of first even natural numbers is
Statement-2 : The sum of first natural numbers is and the sum of squares of first natural numbers is
Statement-1 is true,Statement-2 is true; Statement-2 is not a correct explanation for Statement-1
Statement- 1 is true, Statement-2 is false
Statement-1 is false, Statement-2 is true
Statement-1 is true, Statement-2 is true; Statement-2 is correct explanation for Statement-1
As we learnt
Summation of series of natural numbers -
- wherein
Sum of first n natural numbers
Summation of series of natural numbers -
- wherein
Sum of squares of first n natural numbers
Option 1)
Statement-1 is true,Statement-2 is true; Statement-2 is not a correct explanation for Statement-1
Option 2)
Statement- 1 is true, Statement-2 is false
Option 3)
Statement-1 is false, Statement-2 is true
Option 4)
Statement-1 is true, Statement-2 is true; Statement-2 is correct explanation for Statement-1
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