20 and 21 Average

20 and 21 average provides the comprehensive information about what is the average of 20 and 21, and how it is being calculated mathematically. To calculate the average, the given quantities 20 and 21 can be of any physical quantity but both should have been expressed in the same measurement units.

20 and 21 average:
= (20 + 21)/2,
= 41/2,
= 20.5

Hence,
the average of 20 and 21 is equal to 20.5

where,
20 and 21 physical quantities in same measurement units,
41 is the sum of quantities,
2 is the total number of quantities,
20.5 is the average of 20 and 21

The step-by-step work shows how to find what is the average of 20 and 21. The solution for 20 and 21 average is same for all the following queries but have to append the measurement units based on the measurement units of physical quantities being measured.

Unitless Measurement:
what is the average of 20 and 21?

Average Speed:
What is the average speed of a bus which covered the distance from point A to B at the speed of 20 mph (miles per hour) and B to C at the speed of 21 mph (miles per hour)?

Average Volume:
The volume of cylinder A is 20 gallons and cylinder B is 21 gallons, what is the average volume of cylinders?

Average Capacity:
A Lincoln theater has the volume of 20 seats and Brooklyn theater has the volume of 21 seats, what is the average capacity of the theaters?

Average Score or Marks:
John has scored 21 marks in mathematics and 20 marks in science in the examinations conducted. What is an average of marks John scored?


Solved Example:
what is the average of 20 and 21?

step 1 Address the input parameters and observe what to be found:
Input values:
Quantity A = 20
Quantity B = 21

What to be found:
Find the average of 20 and 21

step 2 Find the sum of quantities 20 and 21.
20 + 21 = 41

step 3 Find how many number of inputs:
The calculation involves two quantities 20 and 21, so the number of quantities is 2.

step 4 To find the average of 20 and 21, divide the sum of quantities 41 by the total number of quantities 2:
= 41/2
= 20.5
(20 + 21)/2 = 20.5

Hence,
20.5 is the average of 20 and 21.