I have 3 books by dickens , 2 books by Alcott and 2 by Salinger .in how many ways can these be arranged in a straight line on a shelf such that the books by each author are put together
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irst arrange by author; this can be done in 3! = 6 ways.
Next, the Dickens books can be arranged in 3! = 6 ways,
the Alcott books in 2! = 2 ways and the Salinger books
in 2! = 2 ways. The total number of ways is thus
6*6*2*2 = 144 ways,
Next, the Dickens books can be arranged in 3! = 6 ways,
the Alcott books in 2! = 2 ways and the Salinger books
in 2! = 2 ways. The total number of ways is thus
6*6*2*2 = 144 ways,
ayeshamuhammad1:
What does arranging by author means , having done it before in any sum
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