What three numbers have an average of 12?
Part 1: Understanding the Problem
We're looking for three numbers whose average is 12. This means if we add these three numbers together and divide by 3, we should get 12.
Step-by-step Solution:
- Recall the average formula: Average = (Sum of numbers) / (Count of numbers)
- In this case: 12 = (x + y + z) / 3
- To find the sum, multiply both sides by 3: 12 * 3 = x + y + z
- So, the sum of our three numbers should be: 36
Part 2: Finding Solutions
Now, let's find multiple sets of three numbers that add up to 36.
Solution 1:
12, 12, 12
Verification:
(12 + 12 + 12) / 3 = 36 / 3 ≈ 12
This solution is correct!
Solution 2:
12, 12, 12
Verification:
(12 + 12 + 12) / 3 = 36 / 3 ≈ 12
This solution is correct!
Solution 3:
18, 6, 12
Verification:
(18 + 6 + 12) / 3 = 36 / 3 ≈ 12
This solution is correct!
Solution 4:
5, 30, 1
Verification:
(5 + 30 + 1) / 3 = 36 / 3 ≈ 12
This solution is correct!
Solution 5:
33, 2, 1
Verification:
(33 + 2 + 1) / 3 = 36 / 3 ≈ 12
This solution is correct!
Explanation:
As you can see, there are many possible solutions. We can find more by:
- Choosing any two numbers
- Subtracting their sum from 36 to get the third number
Remember:
- The numbers don't have to be whole numbers.
- They can even be negative (although that might not make sense in some real-world contexts).
- The order of the numbers doesn't matter for the average.