Question

fiind the Average of even number 1 to 20

Answer 1

Sum of All even numbers from 1 to 20
2+4+6+8+10+12+14+16+18+20=110
Average =sum of quantities/Their number
So 110/10
On reducing it we get answer 11
So the average of even numbers from 1 to 20 is 11

Answer 2

to find average=sum of all numbers divided by how many numbers are present

(2+4+6+8+10+12+14+16+18+20)/10
=110/10
=11
the average of even number is 11