What is the arithmetic mean of first 20 odd natural numbers?
1). 17
2). 19
3). 22
4). 20
Sum of first n odd natural numbers = n2.
So, the arithmetic mean of first n odd natural numbers = n2/n = n.
Here n = 20.
∴ the arithmetic mean of first 20 odd natural numbers = 20.What is the arithematic mean of first 20 odd natural numbers