10a + 10b = 35, what is the average (arithmetic mean) of a and b?
- 10
- 7
- 3.5
- 1.75
Explanation
To find the average (arithmetic mean) of a and b, we need to first solve for a and b.
Given equation: 10a + 10b = 35
Divide both sides by 10: a + b = 3.5
Since we want to find the average of a and b, we can use the fact that the average of two numbers is equal to their sum divided by 2.
So, (a + b)/2 = 3.5/2
= 1.75
Therefore, the average (arithmetic mean) of a and b is 1.75.
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