What three numbers have an average of 691?
Part 1: Understanding the Problem
We're looking for three numbers whose average is 691. This means if we add these three numbers together and divide by 3, we should get 691.
Step-by-step Solution:
- Recall the average formula: Average = (Sum of numbers) / (Count of numbers)
- In this case: 691 = (x + y + z) / 3
- To find the sum, multiply both sides by 3: 691 * 3 = x + y + z
- So, the sum of our three numbers should be: 2073
Part 2: Finding Solutions
Now, let's find multiple sets of three numbers that add up to 2073.
Solution 1:
691, 691, 691
Verification:
(691 + 691 + 691) / 3 = 2073 / 3 ≈ 691
This solution is correct!
Solution 2:
691, 691, 691
Verification:
(691 + 691 + 691) / 3 = 2073 / 3 ≈ 691
This solution is correct!
Solution 3:
112, 1839, 122
Verification:
(112 + 1839 + 122) / 3 = 2073 / 3 ≈ 691
This solution is correct!
Solution 4:
806, 447, 820
Verification:
(806 + 447 + 820) / 3 = 2073 / 3 ≈ 691
This solution is correct!
Solution 5:
1718, 12, 343
Verification:
(1718 + 12 + 343) / 3 = 2073 / 3 ≈ 691
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 2073 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.