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Comment on Mean of 2 Numbers
why is this not 40+w since if
We have two numbers. One number is w, and our goal is to find the other number.
If we say that 40+w is the other number, then the two numbers are w and 40+w
What is the average of w and 40+w? Let's find out.
Average = (w + 40+w)/2 = (40 + 2w)/2 = 20 + w
This doesn't work, because question tells us that the average = 40 (not 20 + w)
Now let's perform the test on the actual correct answer (D).
If D is the correct answer then the two numbers are w and 80-w
Average = (w + 80-w)/2 = 80/2 = 40
Does that help?