Find the average of first 30 natural numbers.  Pick one
A) 15.5	B) 15.9	C) 15.2	D) 15.8	E) 65.2
Explanation:   Sum of first n natural numbers = n(n+1)/2   Hence, sum of first 30 natural numbers = (30 x 31)/2 = 465   Therefore, required average of = 465/30= 
<gadget id="calculator">465/30</gadget>
<output>31/2 = around 15.5</output>
15.5   15.5NSWER: 15.5
<result>A</result>
Find the average of first 30 natural numbers.