Find the average of the first 21 natural numbers?
Choose the correct choice from the following:
A) 8
B) 9
C) 10
D) 11
E) 12
Average of the first 'n' natural numbers = (n + 1)/2   We get  (21+ 1)/2= 
<gadget id="calculator"> (21+ 1)/2</gadget>
<output>11</output>
11   ANSWER:11
<result>D</result>
Find the average of the first 21 natural numbers?