Find the average of first 15 natural numbers. Choose one: A) 10 B) 120 C) 15 D) 8 E) 16
Explanation:   Sum of first n natural numbers = n(n+1)/2   Hence, sum of first 15 natural numbers = (15 x 16)/2 = 120   Therefore, required average of = 120/15= 
<gadget id="calculator">120/15</gadget>
<output>8</output>
8   ANSWER: 8
<result>D</result>
Find the average of first 15 natural numbers.