What three numbers have an average of 561?
Part 1: Understanding the Problem
We're looking for three numbers whose average is 561. This means if we add these three numbers together and divide by 3, we should get 561.
Step-by-step Solution:
- Recall the average formula: Average = (Sum of numbers) / (Count of numbers)
- In this case: 561 = (x + y + z) / 3
- To find the sum, multiply both sides by 3: 561 * 3 = x + y + z
- So, the sum of our three numbers should be: 1683
Part 2: Finding Solutions
Now, let's find multiple sets of three numbers that add up to 1683.
Solution 1:
561, 561, 561
Verification:
(561 + 561 + 561) / 3 = 1683 / 3 ≈ 561
This solution is correct!
Solution 2:
561, 561, 561
Verification:
(561 + 561 + 561) / 3 = 1683 / 3 ≈ 561
This solution is correct!
Solution 3:
853, 309, 521
Verification:
(853 + 309 + 521) / 3 = 1683 / 3 ≈ 561
This solution is correct!
Solution 4:
1184, 29, 470
Verification:
(1184 + 29 + 470) / 3 = 1683 / 3 ≈ 561
This solution is correct!
Solution 5:
351, 858, 474
Verification:
(351 + 858 + 474) / 3 = 1683 / 3 ≈ 561
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 1683 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.