Posted by Callie on Monday, April 16, 2012 at 6:20pm.
A performance was rated on a 3point scale by an audience. A rating of 1 was given by 30%, a rating of 2 was given by 60%, and a rating of 1 was given by 10%. To the nearest tenth, what was the average of the ratings?

Geometry  Reiny, Monday, April 16, 2012 at 7:11pm
I think you have a typo, you have 2 different percents for the same rating of 1.
I will assume the last was a rating of 3
Think of it as 30 1's, 60 2's and 10 3's
for a sum of 30 + 120 + 30 = 180
average = 180/100 = 1.8
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