SOLUTION: 30% of the signs are nonreflective.If 4200 signs are reflective, how many signs are there in all?

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Question 527882: 30% of the signs are nonreflective.If 4200 signs are reflective, how many signs are there in all?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
4200/0.7=6000