Multiple choice What is the average of first n whole numbers? (n - 1)/2 (n + 1)/2 n/2 data inadequate n/3 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Whole numbers start from 0; hence n whole numbers means n-1 natural numbers. Sum first n-1 natural numbers is {(n-1)(n-1+1)}/2 ; Average is ((n-1)*n)/(2*n) , Average is (n-1)/2.