Answer
75%
21.43%
Work Step by Step
15 of 20 new authors are unsuccessful. That is $15/20*100=75$%
15 of 70 unsuccessful author are new. That is $15/70*100=21.43$%
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 7 - Section 7.1 - Sample Spaces and Events - Exercises - Page 458: 56
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