# Weighted Averages

• Jul 5th 2012, 02:35 PM
Weighted Averages
What is the weighted average?

if a=50%,b=25%,c=20%,d=5%.

Value of a=136.5/255,
b = 75/75
c =19/20
d = 30/30.
I keep getting different answers. Can someone explain the right way to do this?
• Jul 5th 2012, 02:48 PM
Plato
Re: Weighted Averages
Quote:

What is the weighted average?

if a=50%,b=25%,c=20%,d=5%.

Value of a=136.5/255,
b = 75/75
c =19/20
d = 30/30.
I keep getting different answers. Can someone explain the right way to do this?

What value are you getting?
• Jul 5th 2012, 05:14 PM
HallsofIvy
Re: Weighted Averages
What do "136.5/255", "75/75", "19/20", and "30/30" mean? If they are not simply fractions, which does not seem likely, what I don't know what you mean. Further, you are confusing things by using the same letters, "a", "b", "c", and "d" for both them an their respective weights.

If you had four NUMBERS, A, B, C, and D, with "weights" 50%, 25%, 20%, 5%, respectively, then the "weighted average" would be .5A+ .25B+ .2C+ .05D.
• Jul 6th 2012, 10:35 AM
Wilmer
Re: Weighted Averages
Quote: