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# Really Need Some Help

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Suppose that a book will be selected at random from these 91 total books.

Find the probability that the book is:

1. Detective novel ___   2  hard cover book ____  3. a paperback detective novel _____

4. A paperback or a detective novel ____  5. Not a detective novel ______

Fill in the blanks using answers as decimals rounded to the hundreds

Guest Apr 16, 2018
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Hardcover        Paperback     Total

Detective Novels                12                     20                32

Romance Novels                 8                      28                36

Other                                    9                     14                23

Total                                   29                      62                91

1. Detective Novel  =   32 / 91  = .35

2. Hardcove Book  =   29 / 91  = .32

3. Paperback Detective Novel  = 20/91  = .22

4. Paperback or Detective Novel  =  [ 62 + 32 - 20] / 91  = 74/91  =  .81

5. Not a Detective novel  =  [ 36 + 23 ] / 91  = 59/91  = .65

CPhill  Apr 16, 2018

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