Algebra 2 Common Core

by Hall, Prentice

Published by Prentice Hall

ISBN 10: 0133186024

ISBN 13: 978-0-13318-602-4

Chapter 11 - Probability and Statistics - 11-2 Probability - Practice and Problem-Solving Exercises - Page 685: 13

Answer

$0.3$ or $30\%$

Work Step by Step

First, find the total number of marbles. 50+30+20=100 The probability of choosing a red marble is $\dfrac{\text{number of red marbles}}{\text{total number of marbles}}$=$\dfrac{30}{100}=0.3=30\%$

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