The third number will be equal to 28.
What is an average?
An average is one number chosen to represent a group of numbers; it is often the sum of the numbers divided by the number of numbers in the group.
It is given that the average of the three numbers is 24 and two of the numbers are 21 and 23. The third number will be calculated as below:-
The average is calculated as,
Average = Sum of all numbers / Count of numbers
Let the third number be x.
Average = [ 21 + 23 + x ] / 3
24 = [ 21 + 23 + x ] / 3
72 = [ 21 + 23 + x ]
x = 72 - 21 - 23
x = 28
Therefore, the third number will be equal to 28.
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