What three numbers have an average of 75?
Part 1: Understanding the Problem
We're looking for three numbers whose average is 75. This means if we add these three numbers together and divide by 3, we should get 75.
Step-by-step Solution:
- Recall the average formula: Average = (Sum of numbers) / (Count of numbers)
- In this case: 75 = (x + y + z) / 3
- To find the sum, multiply both sides by 3: 75 * 3 = x + y + z
- So, the sum of our three numbers should be: 225
Part 2: Finding Solutions
Now, let's find multiple sets of three numbers that add up to 225.
Solution 1:
75, 75, 75
Verification:
(75 + 75 + 75) / 3 = 225 / 3 ≈ 75
This solution is correct!
Solution 2:
75, 75, 75
Verification:
(75 + 75 + 75) / 3 = 225 / 3 ≈ 75
This solution is correct!
Solution 3:
200, 5, 20
Verification:
(200 + 5 + 20) / 3 = 225 / 3 ≈ 75
This solution is correct!
Solution 4:
92, 104, 29
Verification:
(92 + 104 + 29) / 3 = 225 / 3 ≈ 75
This solution is correct!
Solution 5:
8, 108, 109
Verification:
(8 + 108 + 109) / 3 = 225 / 3 ≈ 75
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 225 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.