Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 13 - Probability - 13-1 Experimental and Theoretical Probability - Practice and Problem-Solving Exercises - Page 827: 14



Work Step by Step

To calculate probability, we need to divide the number of chances for a certain outcome to occur by the total number of outcomes. In this case, there are $4$ tiles with the letter "I" and $11$ tiles in total. This means that the other $11-4=7$ tiles must be "not I." When we divide $7$ by $11$, we get $\frac{7}{11}$, which is the probability of drawing a letter that is not "I," or $P(\text{Not I})$
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