SOLUTION: Please help solve: six-thirteenths of audiophiles could discriminate between 2 products. If 28 could not discriminate, how many could discriminate?

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Question 196164This question is from textbook
: Please help solve: six-thirteenths of audiophiles could discriminate between 2 products. If 28 could not discriminate, how many could discriminate? This question is from textbook

Answer by edjones(7311) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=number that could discriminate. x+28=total number tested.
x/(x+28)=6/13 Proportion
13x=6(x+28)
13x=6x+168
7x=168
x=24
.
Ed