What three numbers have an average of 66?
Part 1: Understanding the Problem
We're looking for three numbers whose average is 66. This means if we add these three numbers together and divide by 3, we should get 66.
Step-by-step Solution:
- Recall the average formula: Average = (Sum of numbers) / (Count of numbers)
- In this case: 66 = (x + y + z) / 3
- To find the sum, multiply both sides by 3: 66 * 3 = x + y + z
- So, the sum of our three numbers should be: 198
Part 2: Finding Solutions
Now, let's find multiple sets of three numbers that add up to 198.
Solution 1:
66, 66, 66
Verification:
(66 + 66 + 66) / 3 = 198 / 3 ≈ 66
This solution is correct!
Solution 2:
66, 66, 66
Verification:
(66 + 66 + 66) / 3 = 198 / 3 ≈ 66
This solution is correct!
Solution 3:
78, 73, 47
Verification:
(78 + 73 + 47) / 3 = 198 / 3 ≈ 66
This solution is correct!
Solution 4:
64, 30, 104
Verification:
(64 + 30 + 104) / 3 = 198 / 3 ≈ 66
This solution is correct!
Solution 5:
5, 118, 75
Verification:
(5 + 118 + 75) / 3 = 198 / 3 ≈ 66
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 198 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.