Question

the average of first 70 odd natural numbers is​

Answer 1

Answer:

Step-by-step explanation:

The formula for sum of odd number is n^2 where n is the no. of odd numbers between 1 and the given number.

there are 35 odd numbers between 1 and 70. so sum of odd numbers between 1 and 70 is 35^2=1225

and for even numbers is n(n+1).  

so sum of even numbers between 1 and 70 is 35*36=1260

Answer 2

Answer:

Step-by-step explanation:

The first 70 odd natural numbers

= 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,67,69.

Average of first 70 odd natural numbers = sum of the natural numbers / total no.of natural numbers.

= 1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69 / 70

= 1225 / 70

= 17.5 is the answer