Average Of 15 And 21
What is the average of 2 numbers : 15 And 21
How to do ?
Let's add these 2 numbers :
15 + 21 = 36
And then to find average, we have to find center point of the summation of these 2 numbers : 36, so let's divide 36 to 2 .
36 / 2 = 18
Answer = 18
Average of 15 and 21 is 18