Student: Find the average of the first 9 natural numbers?
Options:
(A) 8
(B) 5
(C) 10
(D) 11
(E) 12.
Another student: Let's say, hmmm...
Average of the first 'n' natural numbers = (n + 1)/2
We get (9 + 1)/2 = 5 Final answer: (B).