9 and 12 average provides the comprehensive information about what is the average of 9 and 12, and how it is being calculated mathematically. To calculate the average, the given quantities 9 and 12 can be of any physical quantity but both should have been expressed in the same measurement units.

__9 and 12 average:__

= (9 + 12)/2,

= 21/2,

= 10.5

Hence,

the average of 9 and 12 is equal to 10.5

__where,__

9 and 12 physical quantities in same measurement units,

21 is the sum of quantities,

2 is the total number of quantities,

10.5 is the average of 9 and 12

The step-by-step work shows how to find what is the average of 9 and 12. The solution for 9 and 12 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 9 and 12?

__Average Speed:__

What is the average speed of a bus which covered the distance from point A to B at the speed of 9 mph (miles per hour) and B to C at the speed of 12 mph (miles per hour)?

__Average Volume:__

The volume of cylinder A is 9 gallons and cylinder B is 12 gallons, what is the average volume of cylinders?

__Average Capacity:__

A Lincoln theater has the volume of 9 seats and Brooklyn theater has the volume of 12 seats, what is the average capacity of the theaters?

__Average Score or Marks:__

John has scored 12 marks in mathematics and 9 marks in science in the examinations conducted. What is an average of marks John scored?

__Solved Example:__

what is the average of 9 and 12?

step 1 Address the input parameters and observe what to be found:

__Input values:__

Quantity A = 9

Quantity B = 12

__What to be found:__

Find the average of 9 and 12

step 2 Find the sum of quantities 9 and 12.

9 + 12 = 21

step 3 Find how many number of inputs:

The calculation involves two quantities 9 and 12, so the number of quantities is 2.

step 4 To find the average of 9 and 12, divide the sum of quantities 21 by the total number of quantities 2:

= 21/2

= 10.5

(9 + 12)/2 = 10.5

Hence,

10.5 is the average of 9 and 12.