What three numbers have an average of 115?
Part 1: Understanding the Problem
We're looking for three numbers whose average is 115. This means if we add these three numbers together and divide by 3, we should get 115.
Step-by-step Solution:
- Recall the average formula: Average = (Sum of numbers) / (Count of numbers)
- In this case: 115 = (x + y + z) / 3
- To find the sum, multiply both sides by 3: 115 * 3 = x + y + z
- So, the sum of our three numbers should be: 345
Part 2: Finding Solutions
Now, let's find multiple sets of three numbers that add up to 345.
Solution 1:
115, 115, 115
Verification:
(115 + 115 + 115) / 3 = 345 / 3 ≈ 115
This solution is correct!
Solution 2:
115, 115, 115
Verification:
(115 + 115 + 115) / 3 = 345 / 3 ≈ 115
This solution is correct!
Solution 3:
297, 34, 14
Verification:
(297 + 34 + 14) / 3 = 345 / 3 ≈ 115
This solution is correct!
Solution 4:
315, 19, 11
Verification:
(315 + 19 + 11) / 3 = 345 / 3 ≈ 115
This solution is correct!
Solution 5:
4, 102, 239
Verification:
(4 + 102 + 239) / 3 = 345 / 3 ≈ 115
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 345 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.